Features: Our Bit Holder features a robust chrome vanadium steel constructions that ensures longevity and consistent performances for all your projects. The adjustable depth stop on our Quick Change Bit Holder allows for controlled screw penetration, safeguarding your tool from damage and ensuring a perfect finish every time. Suitable for professional contractors and enthusiasts alike, this tool is designed to simplify your work and improve productivity with its one handed operate capability. Whether you're building decks, framing wood structures, or installing, our Bit Holder is the perfect tool for efficient and precise drilling tasks. This Screw Depth Adjustment Attachments not only streamlines your workflow but also elevates the quality of your constructions projects, making it an indispensable addition to your toolkit. Specifications: Material: 45# Steel Size:Approx.49.8x23mm/1.96x0.91inch 12.5mm to 6.35mm Adapter Package Includes: 1pc Bit Holder note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.