The hexagonal handle has a diagonal diameter of 1/4 inch or 6.35 mm. The inner hexagon has strong magnetism. The total length is 60 mm. Features: The interface has a locking mechanism, a built-in strong magnet, and the tip extends automatically. Suitable for connecting electric drills, screwdrivers, pneumatic screwdrivers, etc. Expand the conversion of various drills and screwdrivers; quickly; greatly improve the efficiency of work. Material: 50# steel. Specifications: normal Total length: 65 (mm) Weight: 35 (g) Specifications: 60mm hexagonal quick connection Product weight: about 25g Special reminder: This extension rod can only be installed with a single-head bit, not a double-head bit!! ! Package Included: 3 x Magnetic Hexagon Clips (Other products not included) Please Note 1) Due to manual measurement, there may be an error of 1-3 cm. Please make sure you do not mind before you bid. 2) Due to differences in monitor settings, the photos may not reflect the actual color of the item.