Type of drill bit needed

You need an SDS bit (that’s how it connects to the masonry drill).

I need to drill 1/2 inch holes in granite rocks maybe 4-5 inches deep, will this do the job or do I need a bigger unit ?

Yes this should handle that, I use it to drill 1/2 holes six inches deep in concrete regularly so granite should be fine. Remember the bits are SDS slotted drill system no chuck key required also a bonus.

Can it hammer only with out rotating?

No. 2 modes only. 1. Drill 2. Hammer Drill

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⚡ Drill smarter, not harder — power and precision in your hands!

VERSATILE PRO TOOL - Ideal for rod hanging, cable trays, brackets, and railing installations
LIGHTWEIGHT AGILITY - Compact 2.08 kg design perfect for all-day use without fatigue
BRUSHLESS EFFICIENCY - Durable German mechanism with brushless motor for longer runtime
POWER MEETS PRECISION - 1.4 joules of impact energy for rapid concrete drilling
VIBRATION FREE CONTROL - Active Shock Vibration Control reduces user fatigue and enhances comfort

The Dewalt DCH172B 20V MAX ATOMIC Rotary Hammer combines a powerful 1.4 joule impact energy with a lightweight 2.08 kg design and brushless motor technology. Engineered with a German durable mechanism and Active Shock Vibration Control, it delivers efficient, comfortable drilling for concrete and masonry tasks. Perfect for professionals needing a compact, cordless tool for installations and mounting jobs.

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Brand	DEWALT(デウォルト)
Model Number	DCH172B
Product Dimensions	28.83 x 21.7 x 27.11 cm; 2.08 kg
Color	lemon tree
Name List for Name Plates	Classic
Material	Combination
Wallpaper Pattern	Solid
Power Source	Battery Powered
Voltage	20
Laser Class	Brush, Compact, Cordless, Lightweight
Included Components	Drill Attachment
Are Batteries Included	No
Battery Type	Lithium Ion
Maximum Rotational Speed	1100 RPM
Item Weight	2.08 Kilograms

Dewalt DCH172B 20V MAX ATOMIC Brushless Lithium-Ion 5/8 in. Cordless SDS PLUS Rotary Hammer (Tool Only)

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