Specifications: Used with a hand drill, power drill, or pin vise, pin drill kit, bit vise, hand drills. Can be used for drilling wood products, plastic products, circuit boards, etc. Great for all sorts of jewelry & watch making as well as being ideal for repair work. Specially designed box keeps bits securely in place and dispenses on drill bit at a time. Item Name: HSS Twist Drill Bits Quantity: 20 Pcs/Set Material: High Speed Steel (HSS) Uses: Woodworking, Home, Electronic Repair, etc Sizes: 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 "Notes: You will find more amazing products if you visit our store. We guarantee the lowest price and the highest quality for all of our products!" Do not used for metal drilling! Due to differences in lighting and screen settings, the color of the project may be slightly different from the picture. Due to different manual measurements, allow for slight size differences. Package Includes: 20 x HSS Twist Drill Bits