Description: Advanced Material: Hex bit holder is made of high quality aluminum alloy material, Screws and fixtures can be inserted and removed quickly and easily,durable and practical to use. Non Slip Handle: The socket wrench screwdriver handle is made of high quality material which is non slip, easy and pretty comfortable to hold in hand, The ergonomic design make it very convenient to use for different repairs. Upgrading: High quality and heavy duty screwdriver adapts to High quality inner hexagonal design, effectively increasing the contact area, preventing bolts from slipping, and improving safety! Application: High precision screwdriver bit holder is designed for M2.5mm,M3mmM3.5mmM4mmM5mmM6mm nut.(AS YOU CHOOSE) A Must have Accessory: hexagon professional screwdriver is A good helper for repair and daily tool use. Great replacement hand tool hexagon tools. Specification: Material: Alloy Steel Size Chart: 5mm: Total Length: 17.7cm/6.97inch Rod Length: 9.3cm/3.66inch Sleeve Outer Diameter: 8mm/0.31inch Sleeve Depth: 1cm/0.39inch 5.5mm: Total Length: 17.7cm/6.97inch Rod Length: 9.3cm/3.66inch Sleeve Outer Diameter: 8mm/0.31inch Sleeve Depth: 1.1cm/0.43inch 6mm: Total Length: 17.7cm/6.97inch Rod Length: 9.3cm/3.66inch Sleeve Outer Diameter: 1cm/0.39inch Sleeve Depth: 1.15cm/0.45inch 7mm: Total Length: 17.7cm/6.97inch Rod Length: 9.3cm/3.66inch Sleeve Outer Diameter: 1.15cm/0.45inch Sleeve Depth: 1.3cm/0.51inch 8mm: Total Length: 17.7cm/6.97inch Rod Length: 9.3cm/3.66inch Sleeve Outer Diameter: 1.15cm/0.45inch Sleeve Depth: 1.35cm/0.53inch 10mm: Total Length: 17.7cm/6.97inch Rod Length:9.3cm/3.66inch Sleeve Outer Diameter: 1.35cm/0.53inch Sleeve Depth: 1.4cm/0.55inch Package Includes: 1Hex Socket Screwdriver