Diamond Core Drill

Above is a picture of a handheld versoin of a core drill, although most tend to be much larger.

A core drill is a machine specifically designed to remove a cylindrical sample of material, much like a hole saw. The material left inside the core sampler (a steel tube used in the process) is referred to as the core, or core sample. Core drills can be used in construction by utilizing a diamond-tipped blade to cut through concrete, asphalt and other hard materials. Core drills are also used for getting ice core samples for tundra areas, and is similar to the Box corer, although it it usually much bigger.

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