Durability & Portable: Bit feature antirust and wear resistant coatings for long term, housed in a compact case for easy storage and portability, ideal for professional and hobbyists Premium Alloy Steel Bit: The set features alloy steel bit with high hardness and toughness, precisely engineered with antislip grooves for secure grip on phone screws, compatible for Phone devices 5Piece Versatile Set: Includes 5 commonly used bit type (pentagon, +, triangle) to cover various phone and tablet repair needs, eliminating the need for additional tools High Torques Output: Engineered for strong torques transmission to tackle stubborn or rusted screws without slipping, minimizing damage to screws and tools Ergonomic AntiSlip Handle: Designed with a comfortable, nonslip handle that reduces hand fatigue during extended repair, ensuring stable operate and efficiency, Manufacturer: ljhnba