Center drills consist of a pilot drill and a countersink. They are used to create holes at the center of a piece of stock so it can be turned between centers on a lathe in metalworking applications. The pilot drill creates a small hole in the stock and the countersink expands the hole, leaving a small gap at the bottom of the hole that helps protect the lathe's centers from damage when the stock is turned on it.
Hey-Type Center Drills with Bell Tip
High Speed Steel + 60 ° Included Angle + Right Hand Cut + Double End