Neiko 00237A 1/2&rdquo; Drive Impact Extension Bar Set, Cr-V Steel | 3-Piece Set | 3&rdquo;, 6&rdquo;, 8&rdquo; Provides extended access to those deep and hard-to-reach fasteners in tight work spaces High strength impact grade chrome vanadium steel extension bars withstand more torque from impact tools and ensure longevity Premium black phosphate coating provides maximum protection from rust and corrosion vs. traditional black oxide finish Spring loaded ball detent at male end locks onto sockets securely and prevents loosening during use for an undisrupted work flow Includes 3 x 1/2 inch drive extension bars: 3, 6 and 8 lengths for a complete and versatile set