I still have a few of those "match patches" and the clamp. Actually, you clamp the patch to the tube and then set it on fire. When it cools, the job is done, you remove the tube from the clamp, and there in no way in the world to remove the patch short of grinding it off. The patch really becomes part of the tube. Too bad the patches are too big for anything smaller than 2 1/2" tubes.