Size - Metric hex head size: 1.5mm (H1.5), hex shank total length: 50mm / 2", high hardness: Each hex screwdriver bit is clearly engraved with size number for easy identification.        
Material - The screwdriver bit is made of heat-treated S2 steel, which has excellent strength, hardness and durability. The surface is nickel plated, which is smooth, reduces friction, enhances its hardness, wear resistance, corrosion resistance and rust resistance, and is not easy to bend, break and deform.        
Features - The screw driver hex head of the screwdriver is easy to use. It can absorb screws stably vertically or tilted, making it easy to fix screws, especially in confined spaces. Precision machined hexagonal head can be in close contact with the screw, making the removal and installation more stable and not easy to slip.      
Application - Hex head bit can drive screws into wood, metal, and other materials effortlessly, and accurately tighten screws without damaging screws and hex bit socket. It is suitable for furniture assembly, mechanical equipment installation, automobile maintenance, home DIY projects, homemade furniture, woodworking, etc.        
Note - 1/4 inch quickly releases hex shank driver bits widely used in pneumatic screwdrivers, manual screwdriver handles, etc. Check whether it is firmly installed on the power tool before use.