Craftsman 20 Pc. 6 Pt. Standard and Metric Easy Read 3/8 In. Dr. Socket Wrench Set. Clear Makings Make the Right Size Easy to Find. Blow Molded Case. High polish sockets wipe clean fast Rugged alloyed steel construction delivers serious torque Thumb controlled ratchet delivers rapid response Blow molded plastic case is protective, portable and organized Backed by the Craftsman Forever Warranty