0.3 - 6.5 mm The chuck is small in size and lightweight, which will not add extra burden to your operation Easily convert your cordless electric screwdriver into a drill to quickly switch between different tasks, reducing the time needed for a project 1/4 inch hex shank fits more easily and securely on power tools Classic 3-jaw keyed design securely holds a wide range of twist drill bits conveniently; Versatile use on impact drills and power drivers to quickly change tasks and keep work moving; Features: Suitable Accessories: Easy to use and easy to install, safe, fast, the 1/4 inch hex key card is easy access to the electric screwdriver. Function: These Keyless drill chucks can easily turn a cordless electric screwdriver into a drill or grinder to perform quick switching tasks and maintain work progress; They are essential accessories for power tools. Wide range of applications: These drill chucks have various specifications and can be adapted to most cordless electric drills and screwdrivers. They can be applied in cars, garages, warehouses, offices, homes, etc. Easy Loading and Unloading: This keyless chuck converter can go from driving to drilling in seconds, and also gives you the freedom to drill with one hand, which is ideal for working in tight spaces. Specifications: Material: Metal Color: Black, Silver Package Includes: 2 x Keyless Chucksbecomeveryrich