Tork Craft Drill Bit Set 25Pce Tin. Coated Metal Case

25PC TiN coated HSS drill bit set Drill bits in the set: Ø1mm Ø1.5mm Ø2mm Ø2.5mm Ø3mm Ø3.5mm Ø4mm Ø4.5mm Ø5mm Ø5.5mm Ø6mm Ø6.5mm Ø7mm Ø7.5mm Ø8mm Ø8.5mm Ø9mm Ø9.5mm Ø10mm Ø10.5mm Ø11mm Ø11.5mm Ø12mm Ø12.5mm Ø13mm Application: The drill bits are made from Titanium nitride coated HSS (hi-speed steel). The drill bits are fully precision ground at 135° with a split point. The drill bits can also be used to drill either wood or metal. Sharpening: The drill bits are re-sharpenable several times. We recommend the following machines as it will sharpen 135 ° HSS split point drill bits with ease: Drill Doctor® 500X - Diameter range of 2.4mm - 13mm (19mm accessory available) Drill Doctor® 750X - Diameter range of 2.4mm - 19mm DAREX® V390 - Diameter range of 3-19mm TIP: When drilling hard metals, always use a coolant/lubricant. We recommend using CT-90.