Manufactured from chrome vanadium steel for strength and durability. - Tough flexible spring shafts. - Flexible extension bar set. - Will flex through 90 degrees fir access into real tight areas - Makes it easier to tighten or loosen nuts / bolts and other fasteners that are situated in awkward hard to reach places with limited space to move. Specification: - Material: Chrome-Vanadium Steel Size Chart: 3\ Length: 7.5cm/2.95inch Width: 2.1cm/0.83inch 5\ Length: 12.5cm/4.92inch Width: 2.1cm/0.83inch 10\ Length: 25cm/9.84inch Width: 2.1cm/0.83inch Package Includes: 3 Pieces Drive Flexible Extension Bar Adapter Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making payment. Please understand due to the difference between different monitors, the picture may not reflect the actual color of the item.