Professional tool for commercial or occasional use 3pc extension bar set Flexible extension bar set 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 Tough flexible spring shafts Flexible extension bar Will flex through 90 degrees fir access into real tight areas Manufactured from chrome vanadium steel for strength and durability 3 pc mixed flexible extension bar set 1/4" 3/8" and 1/2" extension bars SPECIFICIATIONS - 1 x 1/4" Drive flexible extension bar set - total length - 150mm - 1 x 3/8" Drive flexible extension bar set - total length - 200mm - 1 x 1/2" Drive flexible extension bar set - total length - 250mm