Universal hex drive for easy attachment to electric screwdrivers. Quickly converts any 1/4 inch cordless electric screwdriver into a drill or grinder. One-handed operation allows for efficient and secure use. 1/4 inch hex shank fits most standard electric screwdrivers. Compatible with drill bits ranging from 0.3mm to 6.5mm, ideal for precision drilling tasks. Color: Silver and black. Material: Aluminum alloy and carbon steel. Product dimensions: - 90mm long hexagonal handle chuck, 0.3mm–6.5mm capacity, 1/4 inch (6.35mm) shank - 57mm long hexagonal handle chuck, 0.3mm–3.6mm capacity, 1/4 inch (6.35mm) shank - 61mm long round handle chuck, 0.3mm–3.4mm capacity, 1/8 inch (3mm) shank - 59mm long round handle chuck, 0.3mm–3.4mm capacity, 1/16 inch (2.35mm) shank Package includes: 4 x Quick change drill chucks. No additional items included. Note: Lighting and display settings may cause slight variations in color. Measurement tolerance is +/- 1-3cm.