Thre are basically two types of roll crimper.
The old style which bolts / screws to the workbench and is hand cranked available from Ebay. THIS is the one I have.
https://tinyurl.com/yetaetku
and the other type which is used in a vertical drill press........... https://tinyurl.com/5yx3jhw3
Beavergrease has been selling them on TradeMe jeff@beavergrease.co.nz
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