Description: Professional Premium Materials: made of chromium vanadium steel,which has high hardness, high torque and good toughness. The rod is anti corrosion, rust-proof and durable. Non-slip handle design: Ergonomic comfortable handle is made of environmental PP material. the handle for force-transmission when repairing and crafting, offering you a comfortable hand feeling. Special Feature: Ratchet device, forward rotation, reverse rotation, fixed rotation. The screwdriver does not leave the screw and rotates the handle to improve work efficiency. Strong magnetic tips: Black finish blade with magnetic tips, blackened magnetic tip for effective rust protection which could conveniently attracts screws, it helps you to use very easily. Widely Used: a professional tool for installation and maintenance, and can be applied for any task such as working on domestic appliances, furniture, electronic products, automotive & for factory use. Specification: Material: chromium vanadium steel Size(4cm): Rod Diameter: 4mm/0.16inch Handle length: 82mm/3.23inch Rod Length: 107mm/4.21inch Size(5cm): Rod Diameter: 5mm/0.2inch Handle length: 122mm/4.8inch Rod Length: 105mm/4.1inch Size(6cm): Rod Diameter: 6mm/0.24inch Handle length: 125mm/4.9inch Rod Length: 177mm/7inch Size(T Type): Rod Diameter: 3/5mm(0.12/0.2inch) Handle length: 65/85mm(2.6/3.3inch) Rod Length: 87/122mm(3.4/4.8inch) Size(6cm Ratchet): Rod Diameter: 6mm/0.24inch Handle length: 140mm/5.5inch Rod Length: 176mm/6.9inch Size(6cm T Type Ratchet): Rod Diameter: 6mm/0.24inch Handle length: 90/145mm(3.5/5.5inch) Rod Length: 176mm/6.9inch Size(12 in 1 Ratchet): 6x105mm/0.24x4.1inch Size(Short Handle): 6x82mm/0.24x3.2inch Package Includes: 1 Piece Screwdriver