Dagger Tools Classic Sheet Metal Shrinking Disc 4.5" diameter for use on right angle grinders with 5/8"-11 spindles. Made from .070/.074 (thickest disc offered), non-magnetic, Stainless Steel (no disc should be made in a magnetic grade stainless for the most obvious reasons), precision stamped for flatness and balance with a 90° turned up outer lip for added rigidity. Shrink effectively stretched or damaged metal panels by appling 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 dollied or bumped up equal to or slightly higher for this form of shrinking to occur. For metal shaping, metalworking, sheet metal repair, auto body repair & restoration. Comes complete with a operation instruction manual. Does not require a backing pad(not included). Also offered in a 9" diameter model: DT-SD1 or Combo: DT-SD Combo (1) ea DT-SD1 & DT-SD2   Proudly, Made in Michigan