Abstract: A duct stretcher that is used to conveniently bring the joining ends of a sheet metal air carrying duct system together so that the two ends can be joined and essentially sealed.

Abstract: An open ended ratchet drive socket wrench (10) and different sized drive sockets (34, 34') provide for connecting and disconnecting nuts of different diameters to studs of different diameters and lengths; each of the drive sockets has a hexagonal fitting (40, 40') on one end that extends outwardly of the head of the wrench for providing clearance between the workpiece and the wrench and to connect to a nut on a stud and wherein each of the different sized sockets has a connector end (35, 35") on the opposite end thereof that extends through the head for connection thereto and for ratchet drive thereby and wherein the connector end (35, 35') has an opening (40a, 40a') therethrough that will clear stud sizes for nuts tightened thereby and the single open ended socket wrench has a stepped bushing that will universally accommodate different sized hexagonal fittings.