Estone&reg; 10 in1 Repair Opening Tools Kit Screwdrivers Set For iPhone 4S 5 5S Samsung HTC The screw bit is made of S2 and titanium alloy process. Suitable for computer digital products such as computer,mobile phone. The crews use built-in design, applicable to various needs and can change expediently. he screwdriver handle is made of pure aluminum alloy, looks beautiful and eye-catching. electroplating,exquisite workmanship,touch and resolute,skid proof and durable