Have a hard time drilling with low-quality bits? Do not worry! This Cobalt Twist Drill Bit Set with 6 multipurpose bits will help you drill different sized holes. All shanks are offered in different sizes so you can drill holes easily for nailing and screwing. Why You'll Love It 1 x 6 pcs cobalt twist drill bits: All pieces come with different diameters. Made of good material: All pieces are made with a heat resistant, strong material. Ease of use: Put them in hand drills and dig as many holes as you need without a worry. Features 6 pcs Cobalt Twist Drill Bit Set Diameter: M3, M4, M5, M6, M8, M10 Hex Shank Tap Drill Bits