This is a brand new 9-piece wobble extension bar set, offering up to 250mm extra reach for difficult tasks. The rounded drive at the end of each bar provides flexibility between the extension and socket. Made from chrome vanadium steel with a mirror polish finish, these bars are drop-forged and heat-treated for enhanced strength and durability. The set includes three 1/4" Dr. extensions (50mm, 100mm, 150mm), three 3/8" Dr. extensions (75mm, 150mm, 225mm), and three 1/2" Dr. extensions (50mm, 125mm, 250mm). It also comes with a handy storage case.