I need to learn about these. I am used to the style in which you drill/drive out two brass rivets, replace the lining and squeeze/set 2 new rivets which go right through the lining. I am told these ones I am looking at are called ‘rivetless’. The linings do not have a hole all the way through. They have 2 depressions which accept a flat rivet head. The rivet head sits above the inner surface where the lining seats, and holds the lining in position. Are these rivets removable? Are they removed each lining replacement or only if damaged, or never - if damaged replace that entire part. Thanks for any info.