The Diamond ... speed for the bit being used. An LED load indicator light alerts the user if too much pressure is applied. The CB215 hand-held drill motor is part of the CORE BORE line of drilling ...

This growth is driven by increasing infrastructure projects, advancements in drill bit technology ... Among its various applications, hand-held diamond core drilling remains the largest segment ...

Diamond core drills are primarily rented ... Also with safety in mind, Saunders recommends a hand-held machine for any holes up to 3 inches, and a drill stand or rig for larger holes.