Tooluxe 00216L 1/2" Drive Ultra Long Extension Bar Set, 3 Piece | 18", 24", 30" | Chrome-Vanadium Steel Three piece set of half inch drive extension bars for loosening and tightening hard to reach fasteners Made of extremely durable drop forged heat-treated chrome vanadium and corrosion-resistant mirror/chrome polish finish Spring-loaded ball detent locks in to prevent parts from slipping into engines or machinery Sockets connect to extension bars with easy-to-use slide and release collar with square drive radius corners reduce socket wear Set includes: 18", 24" and 30" extension bars for 1/2" drives; Fits all 1/2" ratchets, breaker bars