DURABLE: The flexible extension bar set is made from industrial-grade spring steel, the elastomer pole is heat-treated and forged for long-lasting play, and the ball-bearing door on the head drive allows you to securely lock the socket. MULTIPLE SIZE OPTIONS: The universal socket wrenches drive head for electric wrench sockets is available in three drive sizes, such as than 1/4 drive (6.35 mm) x 6 inches in length. 3/8 (10mm) drive in 8 inch length and 1/2 (12.5mm) drive in 10 inch length, versatility is a great addition to any toolbox. FLEXIBLE DESIGN: Spring-loaded ball stops prevent workpieces from slipping in the machine, and the drive radius is square to reduce tool and sleeve wear. EASY TO USE: Professionals rely on extensions flexible to quickly loosen bolts and nuts at awkward angles and in hard to reach positions for light torque applications. WORK EFFICIENTLY: The flexible drive socket extension bar with spring tightly wound steel allows you to reach difficult angles up to 45 while maintaining good rotational torque transfer. Make your installation work more flexible. Specification: Name: Universal Electric Wrench Socket Extension Rod Material: Spring Steel< /p> Size: 1/4 (6.35mm), 3/8 (10mm), 1/2 (12.5mm) Length: 145mm, 200mm, 250mm Interface length: 6.35mm, 10mm, 12.5mm Interface depth: 15mm Color : Silver Package Includes: 1/3 x Socket Wrench Drive Head Note: Due manual measurements, please allow slight measurement deviations. Due to the different display and lighting effects, the actual color of the item may be slightly different from the color showed on the picture.