Features Superior Grip Stability: The chuck firmly holds drill bits securely, ensuring consistent performance and preventing slippage during operation Long-Lasting Durability: Designed for extended use, this chuck offers a reliable solution for your drilling needs, suitable for heavy-duty applications Effortless Installation: Features a user-friendly design for quick and easy installation and disassembly, saving you time and effort on your projects Versatile Compatibility: Accommodates a broad range of clamp sizes from 2 to 1m, making it ideal for various drill bits and enhancing your tool versatility Ergonomic Self-Tightening Design: Engineered with human ergonomics in mind, this chuck provides a comfortable grip and minimizes hand strain during use Features: 1、The chuck can hold the drill bit tightly and sturdy,not easy to loose. 2、 and has long service life,suitable for long time work. 3、Easy to install and disassemble,more convenient and labor-saving. 4、Large range of clamp size which range from 2~1m,suitable for many kinds of drill bit. 5、Keyl and self-tighten type design is more in accordance with human engineering. Specification: Features: The chuck can hold the drill bit tightly and sturdy,not easy to loose. and has long service life,suitable for long time work. Easy to install and disassemble,more convenient and labor-saving. Large range of clamp size which range from 2~1m,suitable for many kinds of drill bit. Keyl and self-tighten type design is more in accordance with human engineering. Specification: Diameter:4m/1.69in Length:58mm/2.28in (3-5mm tolerance) Connection Size:1/2-20UNF Clamp Range:2 ~ 1m / 0.04 ~ 0.51in Package List: 1 x Drill Chuck Note: Before purchase, it is necary to verify whether the connecting thread of your electric drill is 1/2-20UNF. (1/2 - 20 is the definition of thread specification. Specification: 1/2; number of threads (T): 20. UNF, UN is the standard code of inch thread, and F is fine thread). Package List