[Upgraded High Hardness and Strong Magnetic Bit]: The D1 Anti-Slip and Shock-Proof Bits with Phillips Screwdriver Bits are made of High-quality materials, 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. Specification: 25+50+65+70+90+150 Material: alloy steel colour: Black Package Contents: 48 x drill bits