Quick Change 1/4 Inch Hex Shank: Compatible with quickchange chucks for drills, drivers and screwguns. The 1/4 inch hex shank provides a firm lock and easy bit changes without slipping during use. Hardness Chrome Vanadium Construction: Made from chrome vanadium steel, these socket bits offer lasting performance and resistance against abrasion and erosion for demanding workshop applications. Comprehensive Size Range: This 14piece set includes metric sizes from 5mm to 13mm plus fractional measurements from 3/16' to 7/16', providing a broad selection for various nuts, bolts and fasteners. General Compatibility: Suitable for use with electric screwdrivers, socket wrenches, pneumatic wrenches, rechargeable drills and most 1/4' hex drive tools, making it a versatile addition to any toolkit. Practical uses: Furniture assembly and , where the wide size range ensures you have the right fit for different fasteners and quick, slip bit changes. Automotive and mechanical work, enabling you to tackle multiple fastener sizes with one compact set. General home maintenance and DIY projects that require both metric and fractional fastener sizes.