Neiko 00235A 1/2&rdquo; Drive Impact Extension Bar, CR-V Steel | 3-Piece Set | 3&rdquo;, 5&rdquo;, 10&rdquo; Premium impact grade chrome vanadium steel construction with protective black finish for durability Ideally use with impact wrenches and extends access to hard-to-reach fasteners in tight spots Spring-loaded ball at male end retains sockets securely and prevents them from dropping Ball hole at drive end locks onto drive tang of impact tools Set includes 1pc each of 1/2 inch drive 3, 5 and 10 extension bar