The diagonal diameter of the hex handle is 1/4 inch or 6.35 mm. Internal hex has a strong magnetism. The total length is 60 mm. Characteristics: The interface has a locking mechanism, a powerful integrated magnet and automatically ejects the lot head. Suitable for the transfer of electric drills, screwdriver, wind screwdriver, etc., prolongs the conversion of various tips and screwdriver; fast and fast; significantly improves work efficiency. Name: Quick release self-locking hex extension Quantity: 3 pieces attachment type: message material: steel 50 # Features: Normal Total length: 65 (mm) Weight: 35 (g) specifications: Hexagonal fast extension 60 mm product weight: about 25g Special reminder: This expansion rod can only be installed with batch nozzles at one end, but not With double end nozzles! ! !