The swiveling face of this rivet set will keep it flush against the head of the rivet even if you are a little off angle. This means that there is much less of a chance of "smiling" the sheet metal or mis-setting the rivet.
Superior for back riveting flush rivets without damage to the skin surface. Spring loaded plastic guard holds down skin while riveting. Can also be used for "straight" riveting of flush rivets. Made in U.S.A.