TEKTON 1615 1/2-Inch Drive Extra Long Extension Bar Set, 3-Piece Extra long extension bars for extended reach Drop forged carbon steel with a durable, corrosion-resistant chrome plated finish Notches on extension lock onto ratchet drive and a spring loaded ball bearing locks onto sockets Set Includes: (3) 1/2-Inch Drive Extra Long Extension Bars: 15, 18, and 24-Inch Lifetime replacement guarantee