10pcs 1/4 Inch Hex Shank Magnetic Screwdriver Bits Set 65mm S2 Alloy Steel Hex Head Screwdriver Bits Professional Chamfered Ended Security Bit Tamper Proof Screw Tool Hand Tool H6.3x65mmxTRI1.8

Features:
Industrial Grade Material -- Premium heat-treated S2 alloy steel bits for superior hardness HRC58, high torque, good toughness that reduces wear outs and ensures maximum durability.
High Precise Magnetic Tip -- Strong magnetic and high precision, each edge can be accurately locked screws, no damage to the screw and the screwdriver head.
High Precise Chamfered Design -- Chamfered bit end ensure a smooth fit into fasteners and prevent damaging of edges, use for a life time.
Rust Proof Polish Size Mark -- The surface is processed by special blue treatment, good-looking, and not easy to rust. Shank printed with