Material: Made of carbon steel, it can achieve durability and support in daily use, so as to quickly switch tasks and maintain stable work. Antislip round handle: Comfortable large spherical handle, antiskid design, easy to operate by one hand. Press to release the poping-up drill bit and realize quick replacement in one second. Connecting screw extractor: Single screw extractor can be connected quickly. Double screw extractor is only suitable for 0-3 specification. No. 4 extractor larger than the opposite diameter of 6.3 mm cannot be installed. Universal 1/4 hexagonal handle: Suitable for clamping electric drill chuck without quick function. The clamping diameter of chuck must be 6.3 mm. After the connection is stable, it is convenient to replace the accessories of electric tools with hexagonal handle. Wide range of application: The quick connector can be used for charging drill, electric drill and electric tool. It can be used for deck construction, wood frame, plywood floor, building crates, etc. Handle diameter: about 1/4inch Three-jaw chuck range: about 0.3-8mm/0.01-0.31inch Colour: gold Material: steel Package Contents: 6 x tap drill bits 1 x drill chuck Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.