Features steel construction for long service life, ensuring durability and reliability for your drilling needs. Comfortable metal texture and easy clamping provide a user-friendly experience, allowing for efficient and secure usage. Self-tightening keyless feature automatically increases gripping force, ensuring high reliability and stability during . High accuracy design significantly improves operating efficiency, delivering drilling results. for electric hammer or impact drill tool, making it a versatile and essential addition to your toolkit. Features: 1、Made of steel, long service life. 2、Good metal texture, comfortable , easy to clamp. 3、Self tightening keyless feature automatically increasing gripping force, high reliability, and stability. 4、High accuracy, greatly improve your operating efficiency. 5、Well for electric hammer or impact drill tool. Specification: Features: Made of steel, long service life. Good metal texture, comfortable , easy to clamp. Self tightening keyless feature automatically increasing gripping force, high reliability, and stability. High accuracy, greatly improve your operating efficiency. Well for electric hammer or impact drill tool. Specification: Material: Steel Weight: approx. 185g/6.5oz Model: #01 with electric hammer conversion round shank; #02 with hex shank (Optional) Package List: 1* 0.8-10mm drill chuck with electric hammer conversion round shank or 1* 0.8-10mm drill chuck with hex shank Package List