1. Use: quality drill chuck with a holding range of 213 mm/0.040.51 inches; diameter 43 mm; length 58 mm; thread size 1/220UNF. The drill chuck features a wide size range, making it suitable for various drills. 2. ERGONOMIC DESIGN: The keyless selftightening design is more ergonomic. The head shape of the drill chuck ensures comfortable professional and manual continuous use, facilitating easy assembly and disassembly while providing greater comfort and labor savings. 3. PROFESSIONAL MANUFACTURING: The keyless chuck securely holds the drill bit without loosening. The finished product delivers stable performance, meets standard specifications, and is manufactured under strict internal quality control. Its compact size ensures easy installation and use. 4. QUALITY MATERIALS: The keyless chuck is made of metal, offering hardness, dimensional stability, durability, rust and wear resistance, and costeffectiveness. quality construction guarantees reliability and an extended service life.