Dagger Tools Classic Sheet Metal Shrinking Disc 4.5″ diameter for use on right angle grinders/sanders with 5/8″-11 spindles. Made from .070/.075,(industry thickest) non-magnetic Stainless Steel (no disc should be made of magnetic grade stainless), precision stamped for flatness and balance with a 90° turned up outer lip for added rigidity. Shrink effectively stretched, damaged or oil canned metal panels by applying concentrated heating through surface contact friction generated between the disc and a clean body panel. A damaged area worked with the disc and rapidly cooled with shrink down highest points, first. Repeat the process as needed to work the panel uniformly and completely. Additionally, the shrinking disc will planish and smooth out damaged surfaces. Also try on dressed out, butt welded seams. Learn to use on fusion welded joints, virtually no fillers and the headaches that come with that finishing method. Surface to be repaired must be dolled up or bumped, equal to or slightly higher for this form of shrinking to be effective. Works on steel & aluminum panels. For metal shaping, metalworking, sheet metal repair, auto body repair and restoration. Comes complete with a operation instruction flyer. Proudly, Made in Michigan