Twist Drill Bit Set - 5 Pcs Hex Shank HSS Hand Tap Screw Drill Bit Set for Steel

ITEM NAME:Twist Drill Bit Set - 5 Pcs Hex Shank HSS Hand Tap Screw Drill Bit Set for Steel img *{margin:0;padding:0;.The application of nitriding enhances the abrasion performance, surface hardness, fatigue limit, anti erosion ability of the tapping. Suitable for drilling and tapping in aluminum, brass, copper, plastic, wood, steel, etc.