Item Type: HSS Twist Drill Bit Material: HSS High Speed Steel Category: Straight Shank Twist Drill Quantity: 20pc Bit Specifications: 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, 1.0mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm Scope of Application: Woodworking drilling, electronic product maintenance, household repair, wood drilling, plastic products, circuit boards, etc.1Scope of Compatibility: These drill bits are suitable for processing equipment such as electric drills and bench drills, etc. 2Scope of Application: These drill bits are suitable for woodworking drilling, electronic product maintenance, household repair, wood drilling, plastic products, circuit boards, etc. 3High Speed Steel: Made of premium high speed steel material, these drill bits are strong and sturdy, wear resistance, comes with a long life span. 420Pcs: There are 20 pieces drill bits in the package that the sizes are from 0. 3mm to 1. 6mm, you can use them respectively to make different drilling effects. 5Easy Carrying: Comes with a storage box that you can take these drill bits easily with you to help you with your work. 20 x HSS Twist Drill Bit 1 x Plastic Box