The Mechanics Tools M3004B 3/4-inch Drive 4-inch Extension comes complete wtih a lifetime warranty. Features: * 3/4-inch drive * 4-inch extension * Chome Vanadium steel construction * Chrome-plated to resist rust * Recessed edges * Lifetime Warranty What"s In The Box: * Mechanics Tools M3004B 3/4-inch Drive 4-inch Extension