Alpha Dry Core Bits are designed for high-speed dry drilling in granite, porcelain, engineered stone, quartzite, and crystallized glass. Built for use with standard 5/8"-11 angle grinders, they support clean, accurate hole drilling without requiring water. Designed for countertop fabrication and installation work, Alpha Dry Core Bits support plumbing penetrations, fixture mounting, electrical access holes, and rounded corner cuts in sink openings while reducing setup time and cleanup associated with wet drilling. 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
