This is an upsetting block or swage block. I made a few of these for my own use in my shop and thought maybe you'd find a need for them too. I use them when I build tongs or just need some extra steel on the end of a project like a leaf. Or even to start a rivet. So many uses for these heavy blocks. I put three holes in it. 9/16, 1/2 and 3/8 inch. That way you don't have to have a whole lot of these laying around. The face on the block is 3 3/4 inches wide. Height varies. Ranging from 2 3/4 to 4 inches tall. Just let me know which height you would like. If you have any questions just email me. Thank you for shopping weeping willow forge.