Product Overview Drive & Type: Built For A ½″ Square-Drive Impact Wrench Or Ratchet, Featuring An M12 Spline Profile (Commonly Seen In Xzn/“Triple-Square” Fasteners). 55 Mm Length — Compact And Stable Under Torque. 140 Mm Length — Extended Reach For Recessed Fasteners. Reddit.Com Construction & Specs Material: Manufactured From High-Strength Chrome-Molybdenum Alloy Steel, Heat-Treated For Impact Resilience. Finish: Black Phosphate Coating For Corrosion Protection And Durability. Weight & Dimensions: 55 Mm Variant: ~114 G; 55 × 25 × 25 Mm. 140 Mm Variant: ~152 G; 14 Cm Length High-Torque Performance Spline Profile Offers Multiple-Point Contact On Fastener Lobes—Excellent For Handling High Torque Loads While Reducing Rounding. Certified Impact-Rated Engineered For Use With Impact Tools—Superior Strength And Safety Compared To Standard Steel Bits. Secure Retention & Fit One-Piece Design Ensures Secure Engagement With Sockets And Minimal Loosening During Operation. Reach Options Short (55 Mm) For Rigidity, Extended (140 Mm) For Deep Or Recessed Hardware Access.