This drill chuck features a unique locking function with traditional locking methods. It has ratchet teeth on the back and locking pieces mounted on the rear sleeve, providing more effective prevention against bit loosening, ensuring the chuck holds tools more securely. Instantly converts an impact driver to hold non-quick change drill and driver bits. The keyless design allows for easy bit locking and release. - Color: Random (white or black) - Material: Alloy - Size: 1.2 x 1.2 x 4.2 cm - Keyless chuck easily locks onto and releases drill bits - Compatible with drill bits ranging from 0.3 mm to 6.5 mm - Enables use of standard drill bits with SDS drills - Note: Due to lighting effects, monitor brightness, and manual measurement, slight variations in color and size may occur between the photo and the actual item