Manual Metal Shrinker/Stretcher 90mm Throat x 1.2mm Capacity Industrial Description . Make smooth radius curves in sheet metal without cutting.welding,heating or hammering .The shrinker cotracts sheet metal for inside curves .The stretcher expands sheet metal for outside curves .Includes:1 Body,1 set Shrinker Jaw,1 set Stretcher Jaw,1 Handle .Mild Steel Capacity (mm/ga):1.2/18 .Aluminum Capacity(mm/ga):1.5/16 .Throat(mm//in):90//3-1/2 .Jaw Clearance(mm//in):3.2//1/8 .Packing Dimension(mm):320X190X90 .N.W./G.W.(kg):6.6/7