Milwaukee Drill Chuck Replacement, Keyless Hand Drill Chuck, 1/2-20UNF Mount, 2~13mm Self-Tightening Multi-Purpose Drill Chuck. The chuck securely holds drill bits and resists loosening during operation. Durable construction ensures long service life for extended use. Simple to install and remove, providing added convenience and efficiency. Offers a wide clamping range of 2–13mm, compatible with various drill bit sizes. Features a keyless, self-tightening design for improved usability and performance. Features: - Securely holds drill bits, reducing the risk of slippage - Built for durability and long-term reliability - Easy to install and remove without additional tools - Clamping capacity from 2 to 13mm fits a variety of drill bits - Keyless and self-tightening mechanism enhances user control Specifications: - Diameter: 43mm (1.69 inches) - Length: 58mm (2.28 inches), with 3–5mm tolerance - Connection Thread: 1/2-20UNF - Clamp Range: 2–13mm (0.04–0.51 inches) Package List: 1 x Drill Chuck Note: Verify that your electric drill has a 1/2-20UNF threaded shaft before purchasing. (1/2-20UNF refers to a unified fine thread standard with a 1/2 inch diameter and 20 threads per inch.)