Features and Benefits * 3" and 6" Extension included * 1/4" drive Pro-Ratchet included * Packaged in a blow molded case * Popular assortment at the right price This 47 piece socket set includes the following sizes: 1/4”-7/8” (standard length fractional), 3/8”-7/8” (deep fractional), 6mm-19mm (standard length metric) and 10mm-19mm (deep metric).