Makita D-72833 HSS-TiN Drill Bit Set for Metal (6 Piece) The Makita D-72833 is a 6 Piece Drill Bit Set suited to drilling in Metal, all with straight shanks. The Set has 6 different sized Drills: 2, 3, 4, 5, 6 and 8mm. HSS-TiN is High Speed Steel with a titanium-nitride coating, this means that they produce minimal levels of friction and therefore reduces friction deposits. TiN-coated drill bits should last longer than uncoated bits, and you can often push them faster too. The high surface quality of this ground twist drill bit allows extended usage. It is suitable for use on alloyed and non-alloyed steel, malleable cast iron, sintered iron, new silver, copper, bronze and hard plastics such as perspex. Features: Suited to drilling in Metal HSS-TiN for longer life and less friction Suitable on a variety of applications Storage case Specification: Sizes: 2, 3, 4, 5, 6 and 8mm Shank: Straight