1" Mushroom Set

Stubby 2-1/16" mushroom flush set with .401" dia. shank. The 1" dia. face is highly polished. This is the ideal size for setting 3/32" & 1/8" flush head rivets. US made - excellent quality. See also RSMS-75.  Answering a common question about rubber guarded sets vs. non-guarded:We don't generally recommend the sets with the rubber ring. The pressure applied to overcome the tension of the rubber, and get the set up against the aluminum is high. This pressure will end up making a dent in the skin if the bucker does not push back equally as hard, or slips off. All of this pressure makes it harder to keep the bar on the rivet. Instead we recommend using the steel set only, pinching it between the thumb and index finger while just touching the aluminum. This keeps the set from sliding and no pressure needs applied. The bucker simply needs to keep the set against the rivet, and when pulling the trigger the rivet will seem to melt beneath it.  The metal only set is also shaped like a 'mu