- Proper accessories: the silver unit length is 2.7 inches and accepts 0.3-6.5 mm shanks; the black unit length is 1.97 inches and accepts 0.3-3.6 mm shanks. Easy to use and install, fast operation. Includes a 1/4 inch hex wrench for quick adjustments. - Features: keyless drill chucks convert a cordless electric screwdriver into a drill or grinder. Turn the tail to adjust quickly and switch tasks while maintaining work progress. Essential power tool accessory. - Easy lock and release: lock and release drill bits to convert quickly. Change hex shank drives to drilling configurations; compatible with hex drive power tools and drill bits. - Wide compatibility: various specifications and adaptable to most drills and cordless power screwdrivers. Suitable for use in cars, garages, warehouses, offices, and homes. - Use scenarios: - Home improvement and furniture projects: convert a cordless screwdriver into a practical drill for pilot holes, drilling in wood or light metal, or mounting hardware. - Auto and garage tasks: install brackets or mount components in tight spaces, or perform light drilling and grinding as needed. - Small workshop projects: quick tool conversion for drilling and light grinding on DIY projects, hobbyist repairs, or small-scale manufacturing tasks.