High-quality chrome vanadium steel tips with durable, flexible spring. For use where the traditional solid extension bar does not fit. Suitable for all hand ratchet applications. Easy AccessAdvantages depend on Flex bar extensions to quickly loosen bolts and nuts into awkward angles and hard-to-reach areas for light torque applications. Flexible and StrongTightly coiled steel springs allow awkward angles of up to 45 ° Angle , while maintaining a large torque transfer. Make your installation more flexible, convenient and efficient. Flexible Design Spring-loaded locking ball lugs to prevent machine parts from slipping with square drive radius corners Reduce tool and seat Wearing. Durable chrome vanadium anvil and anvil-receiver with mirror chrome finish made of Heavy-duty Spring-steel wounds L with PVC sleeve. Safety HOLD Mode Ball Attachment on the Power Head allows you to securely latch the socket without dropping and without deformation. Multiple size optionsIncluding three drive sizes such as 1/4 (6.35mm), 3/8 (10mm) and 1/2 (12.5mm) for maximum versatility A great addition to any tool kit. SpecificationStyle1/4 (6.35mm)3/8 (10mm)1/2 (12.5mm)Length145mm200mm250mmInterface Length6.35mm10mm12.5mmInterface Depth15mm15mm15mmColorSilverSilverNote:Please use clockwise, not counterclockwise, otherwise the head will fall off easily, reducing the service lifeDue to manual measurement, please allow slight deviation for measurement. Due to different display and lighting effects, the actual color of the item may be slightly different from the color displayed on the pictures.