Description: 13 Piece Hex Fitting Titanium Drill Bit Set is manufactured from High Speed hardened Steel with a titanium coating for faster penetration and increased durability. For drilling in steel, wood, plastics. The drill bits have a quick change 1/4 hex fitting which is suitable for most power tools. Drill Bit Sizes: 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, 4.8mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm Titanium nitride coated hardened steel drill bits for faster penetration & improved wear resistance Use with cordless / impact screwdrivers & drills Drill Bit Sizes Included: 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, 4.8mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm SPETLEK 13Pcs Titanium Coated HSS Steel Drill Bits in Gold