Alpha® Dry Core Bits are high-speed dry drilling bits designed for creating clean, accurate holes in granite, engineered stone, porcelain, and crystallized glass without the use of water. Built for jobsite efficiency, these core bits mount directly to standard high-speed angle grinders with a 5/8"-11 spindle.

Designed to reduce setup time and cleanup associated with wet drilling, Alpha® Dry Core Bits support fast material removal and controlled drilling during countertop fabrication and installation work.

Key Features

• Dry Drilling Design: Allows drilling without water to simplify jobsite operation and cleanup.
• High-Speed Cutting Performance: Provides fast drilling on granite, quartzite, engineered stone, porcelain, and crystallized glass.
• Angle Grinder Compatibility: Fits most popular high-speed grinders with a 5/8"-11 threaded spindle.
• Precision Hole Creation: Produces clean, round holes for faucet mounting and plumbing penetrations.
• Corner Finishing Capability: Can be used to form rounded corners in square or rectangular sink cutouts.
• Multi-Trade Utility: Suitable for drilling access holes for water, gas, and electrical applications.

Available Sizes & Specifications

Part No.	Diameter	Max RPM	Type	Thread
DRB00500	1/2"	12,000	Dry	5/8"-11
DRB00750	3/4"	12,000	Dry	5/8"-11
DRB01000	1"	12,000	Dry	5/8"-11
DRB01375	1-3/8"	12,000	Dry	5/8"-11
DRB01500	1-1/2"	12,000	Dry	5/8"-11
DRB02000	2"	12,000	Dry	5/8"-11

Alpha® Dry Core Bits support efficient dry drilling for countertop fabrication, fixture installation, and service penetrations across hard surface materials.