(3Pcs) 1/4" Hex Screwdriver Bit Holder with 60mm Magnetic Handle Quick Extension for Drill Bit Guide The hex handle has a diagonal diameter of 6.35mm (1/4 inch). The inner hexagon has strong magnetism. The total length is 60mm. Features: The interface has a locking mechanism, a built-in powerful magnet, and the bit is automatically extended. Ideal for connecting electric drills, screwdrivers, pneumatic screwdrivers, etc. Allows quick conversion of various drills and screwdrivers, greatly improving work efficiency. Material: 50# steel Specification: Regular Total length: 65mm Weight: 35g Specification: 60mm hexagon quick release Product weight: approx. 25g Special reminder: This extension rod can only be installed with a single-head bit, not a double-head bit. Package includes: 3 x Hex Clamps Magnetic (Does not include other products). Note: 1) Due to manual measurement, there may be an error of 1-3 cm. Please make sure you do not mind before bidding. 2) Due to differences in monitor settings, the pictures may not reflect the actual color of the item. Non-original accessories, please make sure you do not mind before buying.