GEARWRENCH 6 Pc 1/4" Drive Hex Shank Impact Socket extensions - 1/4", 3/8" and 1/2" Drive sizes - 2-1/2" & 6" long. Included Components: Set Includes: Extension 6mm hex x 1/4" Drive - 2-1/2", Extension 6mm hex x 3/8" Drive - 2-1/2", Extension 6mm hex x 1/2" Drive - 2-1/2", Extension 6mm hex x 1/4" Drive - 6", Extension 6mm hex x 3/8" Drive - 6", Extension 6mm hex x 1/2" Drive - 6".