Features: This 12.5mm to 6.35mm electric wrench adapter features a fast release auto locking mechanism for fast tool changes, optimizing workflow efficiency in professional environments. Engineered with steel construction and precise ball bearing locking systems, it ensures maximumly torques transfer while preventing slippage during high impacts operations. Ideal for automotive technicians, industrial maintenance crews, and DIYer enthusiasts requiring reliabled power tool accessories for heavy duty fastening tasks. Perfect for automotive repair shops, construction sites, or home garages where rapid socket switching is important for engine maintenance, machinery assembly, or equipment repairs. The knurled antislip grip and recessed quadrilateral design work synergistically to minimize bolt wear while providing secure handling during prolonged operations cycles. Specifications: Size: 49mm Suitable for a variety of electric wrenches and 1/2inch pneumatic wrenches Package Includes: 1pcs/2pcs Impacts Wrench Adapter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.