1Excellent Drilling Performance: Good quality high speed steel material, possess of sharpness drilling edge, low drilling resistance, smooth chip evacuation, long life 2Suitable for Handicrafts: Twist drill bits are suitable for electronics, handicrafts, jewelry, clock making, etc. 3Convenient and Easy to Carry: The bits are neatly stowed, convenient and easy to carry, you can take and use at anytime 4DIY, Home or Engineering Use: Twist bits are most suitable for DIY, home and general construction or engineering use, helps a lot 5Different Sizes from 0.4mm-3.2mm: 150Pcs drill bit set contain different sizes from 0.4mm-3.2mm, enough quantitative drill bits can meet your needs for regular replacement Item Type: Twist Drill Bits Material: High speed steel Drill Bit Configuration List(diameter): 10Pcs Each: 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm 5Pcs Each: 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.8mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.8mm, 3.0mm, 3.2mm Uses: Suitable for making electronics, handicrafts, jewelry, clocks and watches, etc. 150 x Twist Drill Bits 1 x Plastic Box 1. Maintain an angle of 910 degrees when in use, not easy to damage. 2. There is a tiny error due to manual measurement. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.