LPX 50 C350
Dayton Lamina LPX 50 C350 Punch LPX50C350 P .3250 (Pack of 2)
Rounded corners includes rivets, and that extra layer of protection extends its lifespan.
Dayton Lamina LPX 50 C350 Punch LPX50C350 P .2620
Using the CPC2G Ceramic Pourable Compound for a mold replication worked out better than expected.