These Ivan brand stainless steel ring spring poppers are perfect for use with medium weight leathers.
The caps measure 15mm across and this size of popper can cope with leather of up to about 2.5mm thick.
These rivets are fitted with Ivan's Steel Press Stud Fitting Tool, seen below in related items. (Please not that the standard 15mm popper tool is not suitable for fitting the stainless steel poppers)
To make holes in your leather to fit the stems of these press studs, you will need a 4mm round hole punch.
This is a pack of 10 poppers. Discounts are available for purchases of 10, 20 and 50 packs.