These tools are traditionally used to create gentle curves and domes in a flat piece of metal but we've found them brilliant for punching the holes in your home made gaskets Doming Block with 8 hemispheres 6mm to 26mm for shaping and forming precision parts.  Doming Punches : 5 , 8, 11, 14, 17, 19, 24, 27mm.

CARBON STEEL DOME PUNCH SET #DIMP