Specifications - Diameter: 43 mm - Length: 71 mm - Length connection size: 1/2-20UNF - Clamping Range: 2~13 mm - Clamp sizes: 1~13 mm Key benefits - Secure and stable grip: the chuck is designed to hold drill bits firmly and sturdily, reducing the chances of loosening during use. - Durable for long hours: built for extended operation with reliable performance. - Versatile compatibility: 1/2-20UNF spindle with 2–13 mm capacity makes it suitable for a wide range of drill bits. - Self-clamping, keyless operation: enables quick bit changes without tools, improving workflow. - Easy installation and disassembly: straightforward to install and remove, saving time and effort. Performance and features - 1/2-20UNF length connection size for compatible drill setups. - Clamping range from 2 to 13 mm, with Clamp sizes listed as 1 to 13 mm in applicable configurations. - Hand drill chuck design suitable as a self-clamping accessory and as an adjustable electric drill chuck driver converter. Compatibility and use - Suitable for standard hand drills and compatible electric drill setups that use a 1/2-20UNF connection. - Ideal for projects requiring quick bit changes and reliable gripping across a 2–13 mm bit range. Use scenarios - Woodworking and carpentry: quickly swap between 2–13 mm bits for drilling pilot holes and larger holes with minimal downtime. - Metalworking and fabrication: secure, high-torque drilling with stable bit retention during prolonged drilling sessions. - DIY and maintenance tasks: convert an electric drill to a convenient chuck driver, enabling easy bit changes and reliable performance for routine maintenance projects.