Malco 12F 12-Inch Folding Tool Handy sight holes assure proper depth alignment Folding seams are formed from two steel halves, permanently joined together Makes hems, pans and drives edges Ideal for HVACR Applications Creates 3/8-Inch and 1-Inch fold depths in ductwork Handy sight holes assure proper depth alignment Folding seams are formed from two steel halves, permanently joined together Makes hems, pans and drive edges