Features Drill Adapter: This drill chuck can convert and extend the power drill to satisfy all your working needs in narrow places. Fr ee Matching: Allows for Fr ee combination with impact screwdriver, electric drill and other power tools, simple and useful. Stable Fixing: The clamping range is 1.5mm to 13mm, and the firm fixing promises stable and efficient working performance. Simpler Works: Designed to have a round handle with 12.7mm thread, both the installation and operation are more convenient. Good Material: Adopting premium C45 steel material, the keyed drill chuck adapter has excellent durability for long term use. 1. Drill Adapter: This drill chuck can convert and extend the power drill to satisfy all your working needs in narrow places. 2. Fr ee Matching: Allows for Fr ee combination with impact screwdriver, electric drill and other power tools, simple and useful. 3. Stable Fixing: The clamping range is 1.5mm to 13mm, and the firm fixing promises stable and efficient working performance. 4. Simpler Works: Designed to have a round handle with 12.7mm thread, both the installation and operation are more convenient. 5. Good Material: Adopting premium C45 steel material, the keyed drill chuck adapter has excellent durability for long term use. Specification: Item Type: Keyed Drill Chuck Material: C45 Steel Drill Chuck Clamping Size: Approx. 1.5 ~ 13mm / 0.06 ~ 0.51in Drill Chuck Connection Thread: 12.7mm, that is, 1/2in. Shank: 4 Pit Shank PackageList: 1 xKeyed Drill Chuck 1 x Keyed Drill Chuck Key 1 x Connecting Rod Package List 1 x Keyed Drill Chuck 1 x Keyed Drill Chuck Key 1 x Connecting Rod