These are usually core samples extracted from solid rock to test for mineral content without blasting away tons of rock.

Cutting holes in glass is a challenging, expensive proposition. This is a water fed core-drill bit. Water feeds through the center of the bit and cools and lubricates the bit as it cuts. There are many different size bits that can be threaded into this water feed system. This is an indespensible tool for many of our commissioned projects.

A hollow drill that can be used to remove sections of material.

A core drill is a drill specifically designed to remove a cylinder of material. The material left inside the drill bit is referred to as the core.