Material - The wrench is made of NO.45 high carbon steel, with special silver surface powder coating treatment, anti-rust, strong and durable. The perfect gift for Father's Day. Precise Features -- Allen wrench large crescent opening, precise design and laser cutting, are of high hardness, firmly grip the telescopic and contact the side holes or the sockets, providing a good fit. Ergonomic design - Adjustable wrench set with silver anti-slip handle. The different laser marking patterns on the head of the castle nut wrench are easy to identify. The personalized bag is easy to organize, carry and store. Wide Applications - This 12 inch round head tape wrench is compatible with general purpose shock absorbers, wrench head screws, threaded bushings and shafts. Suitable for most commercial, plumbing, fittings, daily car and outdoor use. If you have any technical or usage questions, please feel free to contact us, we provide 24 hours response and satisfactory solution.