This is my multi-use swage block for use in an anvil hardy hole. I've included features I often use - a step, 3 half rounds, V and small serrations. The hardy shank can be bolted in three different positions. The swage is made from 32mm square x 130mm long 1050 medium carbon steel.
I offer hardy sizes 3/4" up to 1&1/4" (19mm to 32mm). You can specify your hardy size in either fractional inches or millimeters.