These high speed steel drill bits are fully ground with a 135° split point for precise centring to prevent drill wander. The black oxide coating ensures the drill bits are more durable and resist more→ant to corrosion than standard HSS bits. Draper Black Series drill bits do not need to be used in conjunction with a cooling agent. Suitable for use with metal, wood, chipboard and plastic. Compatible with a standard 10/13mm chuck. Sizes 1.0-13.0mm. Supplied inside a plastic case.Contents:25 x Black drill bits - 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0mmSpecification:Drill bit type: HSSDrill tip angle: 135 …