---
product_id: 58452007
title: "Southwire -MSBST250 Fixture and Ceiling Electrical Box Smart Box Shark Tooth with Hole Saw"
brand: "southwire"
price: "HK$223"
currency: HKD
in_stock: true
reviews_count: 13
category: "Southwire"
url: https://www.desertcart.hk/products/58452007-southwire-msbst250-fixture-and-ceiling-electrical-box-smart-box-shark
store_origin: HK
region: Hong Kong
---

# Precise location accuracy with piercing drill bit Supports fixtures up to 6 lbs with secure mounting Integrated shark tooth hole saw for perfect cuts Southwire -MSBST250 Fixture and Ceiling Electrical Box Smart Box Shark Tooth with Hole Saw

**Brand:** southwire
**Price:** HK$223
**Availability:** ✅ In Stock

## Summary

> 🦈 Cut smart, mount sharp — the ultimate fixture box for pros who demand precision.

## Quick Answers

- **What is this?** Southwire -MSBST250 Fixture and Ceiling Electrical Box Smart Box Shark Tooth with Hole Saw by southwire
- **How much does it cost?** HK$223 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/58452007-southwire-msbst250-fixture-and-ceiling-electrical-box-smart-box-shark)

## Best For

- southwire enthusiasts

## Why This Product

- Trusted southwire brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Heavy-Duty Support:** Mounting hole spacing designed for 3/0 and 4/0 fixtures, supporting up to 6 lbs securely.
- • **Pinpoint Precision:** Center piercing drill bit ensures exact placement for seamless installation.
- • **Cut with Confidence:** Built-in shark tooth hole saw creates flawless holes every time—no extra tools needed.
- • **Surface-Mount Ready:** Raised mounting rings inside back wall for easy basement or attic stud installation.
- • **Effortless Fit & Finish:** Wide flange covers installation errors, delivering a sleek, professional look every time.

## Overview

The Southwire MSBST250 Smart Box Shark Tooth combines an innovative integrated hole saw with precise location accuracy and robust mounting support. Designed for surface-mount installations, it effortlessly cuts perfect holes without extra tools and supports fixtures up to 6 lbs. Ideal for professionals seeking efficiency and flawless finishes in electrical box installations.

## Description

SMART BOX‚Ñ¢ SHARK TOOTH Cuts its own hole and mounts light fi xtures; smoke and carbon monoxide detectors. The built in hole saw creates the perfect sized hole every time. A piercing drill bit located at the center of the blade allows for location accuracy during installation. Raised mounting rings with center hole are located inside the back wall of the box for surface mount installations; basement or attic studs. Notes: Requires 9/16" driver (not included). Supports fixtures up to 6 lbs. 2-1/2" Deep. Volume 16.5 Cu In. Not for use on lath and plaster walls. Madison Electric is now part of the Southwire family. Product packaging may vary.

Review: Clever idea, works great. - I bought some of these to test. Seemed like a great idea except plastic teeth. After looking at the teeth, they are sharp and cleverly set at different angle to cut well, but clearly are thermoplastic, can't get them hot. No worries, I just used a ratchet and socket and turned slowly. Maybe it took a minute longer but I didn't have to figure out where I left the socket crossover to a drill. I cut one hole and the teeth were OK, plus the box slid right into the hole, slick and simple. The hole was so nice I went ahead and fitted a different box with the same OD. No problem, worked great. Curious, I cut another hole with the same teeth. Here is a picture after cutting TWO holes. I could use it again, but I only bought two boxes, and don't need more holes right now. I noticed the biggest problem was the hardcoat and paint. If I wanted to cut 3 or 4 holes, I'd simply score the hard surface away with a knife first. The flange on these boxes is pretty wide, it would cover a bit ot error. I'll never buy any other type of box, these are MAGIC.
Review: Gets the job done! Here’s some instructions... - I bought the Smart Box after viewing a demonstration video and I thought to myself, “great! I wouldn’t need to buy (another) hole saw. (I had lost two before ever using them.) The video was helpful. However, it didn’t mention the teeth could actually skip across the wall leaving a clawed arc if you’re not gripping your drill tightly! Tip your drill slightly and hold on tight, then straighten to cut directing into your wall or ceiling. The hole saw will make a perfectly round plug. Don’t take your time cutting your hole as the plastic (or resin) Shark teeth on the hole saw will wear down before you have finished cutting your hole. My Smart Box’s cutting teeth wore down so much it could not cut completely through the drywall’s backing, so make quick work of your hole. I only wished there were instructions on how to easily (or properly) remove the tabs for the wires and install the box. I banged mine up pretty well. The best I can explain is that after removing the cutting bit, bust through one of the tabs along the back or bottom of the box. Bring your wire through the hole box then slide your box into its hole. (It will be a snug fit). A little wiggling and rocking while push will help. Make sure you position the hole you made in the box so that it faces the direction from where your wires come. I used an old work box so it was important to know this before inserting the box as the wires bundled in the wall seemed to dictate how I was going to manage to pull any more wire out after I installed the box. The box has a flange so insert it until the flange is almost against the wall or ceiling and turn the 3 mounting screws until they pull your box completely into its hole, or until the flange is tight against the wall or ceiling. I guess I should mention you should also be mindful of a vapor barrier. I accidentally tore a little hole in ours when I knocked the hole thru the drywall backing when the Shark Tooth hole saw’s teeth wore down. I used the Smart Box to install a wall light in my kids’ bathroom. I had replaced their light when I discovered there was no work box behind it. Just wires capped off and shoved into a jagged hole in the wall. I figured I should bring it up to code and raise the light since it was considerably larger than the original. So large it hung in front of their bathroom mirror. The hole the Smart Box hole saw made left me with a plug that perfectly fit the gaping hole left by the builder. The 3 mounting screws secured the box firmly in place and provided the much needed support for their large wall light. A fire hazard was quickly mitigated! I wanted to use a Smart Box again when I move a light fixture in my kitchen, but wouldn’t you know...one of my hole saws showed up! Lol

## Features

- A perfect cut every time
- No special hole saw or template required
- Location accuracy during installation
- Mounting hole spacing accommodates 3/0 and 4/0 fixtures; supports fixtures up to 6 lbs
- Requires 9/16 inch driver (not included)Madison Electric is now part of the Southwire family Product packaging may vary

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B077D92HMQ |
| Best Sellers Rank | #2,490 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #74 in Hole Saws |
| Brand | Southwire |
| Brand Name | Southwire |
| Color | Gray |
| Customer Reviews | 3.8 out of 5 stars 1,174 Reviews |
| Finish Type | Matte |
| Global Trade Identification Number | 00784297023101 |
| Included Components | Fixture and Ceiling Electrical Box Smart Box Shark Tooth with Hole Saw |
| Installation Type | Surface-Mount |
| Item Type Name | Shark Tooth with Hole Saw |
| Manufacturer | Madison Electric Products |
| Material | Polycarbonate |
| Model Number | MSBST250 |
| Number of Items | 1 |
| Part Number | MSBST250 |
| Style | Shark Tooth |
| UPC | 784297023101 |
| Unit Count | 1 Count |

## Product Details

- **Material:** Polycarbonate
- **Brand:** Southwire
- **Color:** Gray
- **Style:** Shark Tooth
- **Finish Type:** Matte

## Images

![Southwire -MSBST250 Fixture and Ceiling Electrical Box Smart Box Shark Tooth with Hole Saw - Image 1](https://m.media-amazon.com/images/I/61qAsG6V2tL.jpg)
![Southwire -MSBST250 Fixture and Ceiling Electrical Box Smart Box Shark Tooth with Hole Saw - Image 2](https://m.media-amazon.com/images/I/81UPBtG1jDL.jpg)
![Southwire -MSBST250 Fixture and Ceiling Electrical Box Smart Box Shark Tooth with Hole Saw - Image 3](https://m.media-amazon.com/images/I/71WSdBkukBL.jpg)
![Southwire -MSBST250 Fixture and Ceiling Electrical Box Smart Box Shark Tooth with Hole Saw - Image 4](https://m.media-amazon.com/images/I/8179uPi4YQL.jpg)
![Southwire -MSBST250 Fixture and Ceiling Electrical Box Smart Box Shark Tooth with Hole Saw - Image 5](https://m.media-amazon.com/images/I/81FHkg9M7TL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Clever idea, works great.
*by L***H on November 1, 2020*

I bought some of these to test. Seemed like a great idea except plastic teeth. After looking at the teeth, they are sharp and cleverly set at different angle to cut well, but clearly are thermoplastic, can't get them hot. No worries, I just used a ratchet and socket and turned slowly. Maybe it took a minute longer but I didn't have to figure out where I left the socket crossover to a drill. I cut one hole and the teeth were OK, plus the box slid right into the hole, slick and simple. The hole was so nice I went ahead and fitted a different box with the same OD. No problem, worked great. Curious, I cut another hole with the same teeth. Here is a picture after cutting TWO holes. I could use it again, but I only bought two boxes, and don't need more holes right now. I noticed the biggest problem was the hardcoat and paint. If I wanted to cut 3 or 4 holes, I'd simply score the hard surface away with a knife first. The flange on these boxes is pretty wide, it would cover a bit ot error. I'll never buy any other type of box, these are MAGIC.

### ⭐⭐⭐⭐⭐ Gets the job done! Here’s some instructions...
*by L***D on March 31, 2021*

I bought the Smart Box after viewing a demonstration video and I thought to myself, “great! I wouldn’t need to buy (another) hole saw. (I had lost two before ever using them.) The video was helpful. However, it didn’t mention the teeth could actually skip across the wall leaving a clawed arc if you’re not gripping your drill tightly! Tip your drill slightly and hold on tight, then straighten to cut directing into your wall or ceiling. The hole saw will make a perfectly round plug. Don’t take your time cutting your hole as the plastic (or resin) Shark teeth on the hole saw will wear down before you have finished cutting your hole. My Smart Box’s cutting teeth wore down so much it could not cut completely through the drywall’s backing, so make quick work of your hole. I only wished there were instructions on how to easily (or properly) remove the tabs for the wires and install the box. I banged mine up pretty well. The best I can explain is that after removing the cutting bit, bust through one of the tabs along the back or bottom of the box. Bring your wire through the hole box then slide your box into its hole. (It will be a snug fit). A little wiggling and rocking while push will help. Make sure you position the hole you made in the box so that it faces the direction from where your wires come. I used an old work box so it was important to know this before inserting the box as the wires bundled in the wall seemed to dictate how I was going to manage to pull any more wire out after I installed the box. The box has a flange so insert it until the flange is almost against the wall or ceiling and turn the 3 mounting screws until they pull your box completely into its hole, or until the flange is tight against the wall or ceiling. I guess I should mention you should also be mindful of a vapor barrier. I accidentally tore a little hole in ours when I knocked the hole thru the drywall backing when the Shark Tooth hole saw’s teeth wore down. I used the Smart Box to install a wall light in my kids’ bathroom. I had replaced their light when I discovered there was no work box behind it. Just wires capped off and shoved into a jagged hole in the wall. I figured I should bring it up to code and raise the light since it was considerably larger than the original. So large it hung in front of their bathroom mirror. The hole the Smart Box hole saw made left me with a plug that perfectly fit the gaping hole left by the builder. The 3 mounting screws secured the box firmly in place and provided the much needed support for their large wall light. A fire hazard was quickly mitigated! I wanted to use a Smart Box again when I move a light fixture in my kitchen, but wouldn’t you know...one of my hole saws showed up! Lol

### ⭐ Teeth will burn!
*by C***A on August 9, 2026*

Do not buy! The teeth are made of plastic and will burn up when drilling. Could not complete installation because all the teeth burned up and then you have to deal with the smell of burnt plastic. Save yourself the headache and just cut the hole with a regular saw

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-09-25*