Features: Alloys steel material have highhardness and long service life after heat treatments. Strong magnetic design for screw adsorption, simple, efficient, and fast operation. The polygonal hexagonals handle design effectively prevents slipping, and the clamping is stable, wear resistant, and not easy to slip. Specifications include 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, and 12. Suitable for assembly and disassembly, mechanical maintenance, household maintenance, automobile maintenance and other operations. Specifications: Material:Alloys Steel Quantity:8,10 Length:Approx.100mm/3.93'' 1/4" hex shank Package Includes: 8/10Pcs Screwdriver Bit note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.