Surebonder 1/4" Steel Rivets are very useful when repairing bent steel shelving where exposed nuts and bolts are unacceptable. While a heavy-duty riveting tool was definitely required, the added grip and strength of these rivets did the job. I've had a few cases where the shank broke outside of the rivet and a few times the riveting tool teeth slipped off the shank. Whether the shank material was too hard, brittle, or operator error, the final portion of the expansion was difficult to reach and another tool was required to set the shank flush with the rivet. Just have a good vise and file handy for those occasions.