What is the maximum diameter? The description says 18" while the video says 24"

With the "extender leg" attached I am able to open the compass to a diameter of 11.5". I don't see how you could expand it to 18" or 24".

Can you use this with other drawing utensils like markers?

Yes you can use markers and pens and pencils. Built in there is a lead, but there's an attachment that lets you use any kind of writing pen/marker/pencil that is up to 1/2 in diameter.

What is the diameter of the lead? I need more than the standard black lead. Most compass's are 2mm>

This is also 2mm. Make one, there's plenty of cool compass plans available online. That's what I did for my trammel points (beam compass)

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– Mr. Pen- Professional Geometry Set Metal Compass, 7 pcs, Geometry Precision Tool Set with Shatterproof Storage Box, Drafting Tools & Drafting Kits, Circle Drawing Tools for Engineers Students

Product ID: 422898955

Details

Brand
Mr. Pen
Material
Metal
Number of pieces
7
Style
7 pcs Geometry

📏Up to 22-inch circle precision

⚙️Spring bowhead & center wheel tech

🛡️Shatterproof reusable storage

HK$134

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Description

🎯 Master your craft with precision and style!

DURABLE PORTABLE - Robust metal build housed in a sleek, shatterproof storage box for on-the-go use.
ENGINEERED STABILITY - Spring bowhead and center wheel prevent slip for steady, confident drafting.
VERSATILE ATTACHMENTS - Includes extension beam and interchangeable handles for pens, pencils, and stylus.
PRECISION PERFECT CIRCLES - Draw flawless circles up to 22 inches with professional-grade accuracy.
TRUSTED BY FUTURE INNOVATORS - Favored by students and engineers alike for GCSE and professional projects.

The Mr. Pen Professional Geometry Set is a 7-piece metal drafting kit designed for engineers, students, and creatives. Featuring two high-quality compasses with spring bowhead and center wheel for slip-free precision, it enables drawing circles up to 22 inches. The set includes versatile attachments and comes in a durable, shatterproof storage box, combining portability with professional-grade performance.

Specifications

ASIN	B08WX2S3XP
Art Craft Kit Type	Drafting
Best Sellers Rank	134,449 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 105 in Drafting Compasses
Brand Name	Mr. Pen
Customer Reviews	4.5 4.5 out of 5 stars (1,166)
Included Components	2 high-quality professional compasses, extension beam, interchangeable attachments, slip handle, clear reusable box
Manufacturer	Mr. Pen
Manufacturer Part Number	GE01
Material Type	Metal
Model Number	GE01
Number of Packs	1
Number of Pieces	7
Product Style	7 pcs Geometry Tool Set
Set Name	7 pcs Geometry Tool Set
UPC	810053332382

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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HK$134

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hong Kong.

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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