Tiitstoy 10Pcs Impact Torsion Insert Bit Set Tool Screwdriver Insert Bits

10Pcs Impact Torsion Insert Bit Set Tool Screwdriver Insert Bits Feature: Proprietary Precision CNC Machined Tips for Excellent Fit in Fastener Recess Made From S2 Modified Shock Resistant Steel for Professional Performance and Durability Precision Controlled Heat Treatment for Extreme Durability and Wear Protection Easy to use and durable Gunmetal Grey Finish Description: Material:CR-V Surface Electroplating Specifications:T3 T4 T5 T6 T7 T8 T9 T10 T15 T20 size:28mmx4mm Product Included: 10Pcs Impact Torsion Insert Bit Set Tool Screwdriver Insert Bits