20.0mm

Premium Diamond Tile&Glass Bit Ideal for drilling a clean hole into hard materials such as ceramics, porcelain, marble and slate.

HSS-M Blacksmith Drill Bit Manufactured from a high grade M2 tool steel. This durable engineering quality drill will give a consistent rapid performance when drilling larger diameter holes into all non-alloy materials. Can be used in a 1/2" chuck. The 118° split point prevents the bit from drifting. Mainly used for drilling sheet metal.