[Upgraded High Hardness and Strong Magnetic Bit]: The D1 Anti-Slip and Shock-Proof Bits with Screwdriver Bits are made of high quality S2 steel, high hardness, wear resistance and impact resistance, it is toughness and to use long time. Built for high-impact high_strength screwdriving,Suitable for screwdrivers, especially impact drivers [Non-slip Shock Proof serrated blade]: Qufckthrough metal Shock reststantand notcracked Easily penetrate metal plates with dovetail nails. Saygooibye to screwslippage Screw deep bite effectively reduces head slippage Greatly improve work efficiency. [Non-slip Magnetic Impact Bit]: Our Magnetic Screwdriver Bit Set feature a powerful magnetic , anti-slip fine tooth design that securely holds screws in position, allowing for effortless one-handed operation. [Impact- Magnetic Bit]: Strong torque,high torque After touching the screw head Impact screwdriver The resulXting collision reaction force partly absorbed by torsion Effectively prevent the cutter head from breaking. [Anti-Shock High Hardness and Strong Magnetic Bit]: Quickly through metal Shock reststantand notcracked Easily penetrate metal plates with dovetail nails. Widely used in ceramic tile, vitrified brick, glass, concrete, metal, wood, and other drilling purposes. Colour:Black Material:alloy steel Size:25+50+65+70+90+150mm Package Contents: 5set * bits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.