Features 1、TOUGH AND STRONG: Non slip fine tooth design screwdriver bit set allows easy locked the screws and removal screws. And the magnetized screwdriver bits with overall induction hardening and prevent impact, high toughness, more long lasting 2、HARD MATERIAL: PH magnetic screwdriver bits are made of quality TS2 prevent impact alloy steel. Hardness reached 63HRC which could be used on high strength working situations 3、APPLICABLE SCENARIO: Screwdriver bits have 1/4 hex shank, quick change, fit well for most manual screwdrivers, electric screwdrivers, electric drills, etc. Suitable for woodworking, machinery manufacturing, and automobile maintenance 4、ACCURATE AND TIGHT: Non slip PH2 bits manufactured with TS2 toolsteel, high grade steel to withstand high torsion output, accurately engineered non slip tips for a tighter fit and less CAM out, can work with high torsion of impact drivers 5、SIZE AND QUANTITY: This PH screwdriver bit set include 10pcs 3-1/2in length screwdriver bits, 1/4in hex shank quick change, meet can be used Specification Item Type: PH Magnetic Screwdriver Bit Set Material: S2 alloy steel Features: High magnetic, strong torsion Application: For electric drill, cordless drill, screwdriver, etc. Size: Approx. 70 x 6.35mm / 2.76 x 0.25in Package List 10 x Screwdriver Bit 1 x Storage Box