The Makita D-72849 is a 10 Piece Drill Bit Set suited to drilling in Metal, all with straight shanks. 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 & Benefits • Suited to drilling in Metal • HSS TiN for longer life and less friction • Plastic storage case • Suitable on a variety of applications Specifications • Sizes: 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10mm • Shank: Straight Contents • 1mm HSS TiN Metal Drill Bit • 2mm HSS TiN Metal Drill Bit • 3mm HSS TiN Metal Drill Bit • 4mm HSS TiN Metal Drill Bit • 5mm HSS TiN Metal Drill Bit • 6mm HSS Ti