3-1/2″ Core Drill Bit

Core Drill 3-1/2″ (89mm) 3/8″ Shank Size by Inland

DIAMOND CORE DRILLS BY INLAND
Diamond-coated Core Drills have a 3/8″ (10mm) shaft and fit most hand drills and drill presses. Numerous diameters make them valuable for drilling a wide range of materials including glass, ceramic, marble, plastic and fiberglass. For best results, core drills larger than 1/2″ should only be used in a drill press.