Makita D-72849 HSS TIN Drill Bit Economy Set (10 Piece) The Makita D-72849 is an Economy 10 Piece HSS-TiN Drill Bit Set with Straight Shanks in sizes: 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10mm suited to drilling metal. The Set is made from High Speed Steel with a titanium-nitride coating, this means that they produce minimal levels of friction and therefore reduce 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: 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10mm Shank: Straight