Neiko 00234A 3/8&rdquo; Drive Impact Extension Bar, Cr-V Steel | 3-Piece Set | 3&rdquo;, 5&rdquo;, 10&rdquo; Premium chrome vanadium steel build with a black phosphate coating provides superior strength and protects against rust and corrosion Three different torque extension bar lengths for wide range of application for multiple impact wrenches: 3", 5", and 10" long Highly compatible bar works well with air drive, electric, and pneumatic wrenches to satisfy mechanic's need on car, bicycle, or industrial jobs Individual pinhole base design adds extra security for tightness by placing in a locking drive tang for fastening stability Handy ball stud at end of impact bar creates friction for locking mechanism to retain socket from dropping 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 3/8 inch drive 3, 5 and 10 extension bar