Feature: Shock Resistant Screwdriver Bits- Built for high-impact high_strength screwdriving, Suitable for screwdrivers, especially impact drivers. Non-slip serrated blade- Say goodbye to screw slippage. Screw deep bite effectively reduces head slippage. Greatly improve work efficiency. Hardness≥62HRC-High precision optimization Material. The hardness of bit head is as high as 62HRC stronger and more durable. Mechanics Principle Design- Strong torque, high torque. After touching the screw head Impact screwdriver. The resulting collision reaction force partly absorbed by torsion. Effectively prevent the cutter head from breaking. Shock Proof- Quick through metal. Shock resistant and not cracked. Easily penetrate metal plates with dovetail nails. Specification: Material: D1 Alloy Steel. Color: Black