General description Sealey Premier Extension Bar Set 1/2" Square Drive includes five pieces designed for professional use. The bars are made from forged Chrome Vanadium steel, heat treated, and chrome plated with a mirror finish for durability and resistance to corrosion. The deep knurling on the shafts provides extra grip, making it easier to spin off fixings. Technical specifications Material: Chrome Vanadium steel Finish: Heat treated and chrome plated with mirror finish Sizes: 50mm, 125mm, 250mm, 375mm, 500mm Model No.: AK6351 EAN: 5024209319034 Other information