The SteelmanPRO 5-pc Half Size Flip Socket Set, No. 60443, comes in a convenient storage case with the four common half sizes for damaged or distorted caps and a knock out bar. The 1/2" drive impact flip style sockets are designed for use with extended anvil impact wrenches or with a 1/2" drive impact extension. The half size impact sockets also feature a thin wall design and are covered by the SteelmanPRO Lifetime Warranty.