[Upgraded High Hardness and Strong Magnetic Bit]: The D1 Anti-Slip and Shock-Proof Bits with Phillips Screwdriver Bits are made of high quality S2 steel, high hardness, wear resistance and impact resistance, it is toughness and durable 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 attraction, anti-slip fine tooth design that securely holds screws in position, allowing for effortless one-handed operation. [Impact-Resistant 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: 10set x bits