I have plenty of Cutting rule, Perf rule, Crease Rule in different heights and thicknesses, from 2pt (0.71mm) up to 6pt (2.1mm), until Covid killed us econmically, that was our trade, making Cutting Formes for the Print, P.O.S., Packaging, Automotive, Gasket, Leather and all sorts of end users

The heights range from 21.60mm up to 38.10mm

Just to confirm what has been said previously, 15mm ply (in the main) was cut on our laser to the required shape, with, what are called "bridges" (gaps in the channel) where the base of the rule had a "U" cut out of it in the identical position, which was then inserted into the board (we would typically burn 0.70mm at the top surface of the board and approx 0.75mm - 0.80mm at the back in order to eliminate bowing (Saucer shape). I still have a couple of deep throat diemaking saws for sale and the 2pt/3pt saw blades, if anyone wishes to make them the traditional way