Make Life Long:GrenPRO impact security torx bit set 50 pcs with Box. Torsion zone to absorb torque peaks to avoid breakage. 10 times life expectancy versus standard bits. For impact driver, drill and screwdriver High-Quality Materials:CNC machined tips, S2 alloy steel body, hardened core to increase bit strength and reduce fracture. Special coating to protect the surface, rust-proof ability; Upgrade the green protective cover, double the anti-rust effect High precision and magnetism:Strengthened magnetic impact torx bits magnetic and high precision. each edge can be accurately locked screws, no damage to the screw and the screwdriver head Widely used:1 ” tamper proof torx bits 50 pcs (t 10) Widely used in home repairs, automobiles, woodworking and other screw driving applications After-sales and service:Please contact us, we are willing to serve you attentively Security Bit Set,Tamper Proof Torx Bit Set,Torque Bit Set,Star Bits Set,torx bit set