The HMR-20M has a 31mm, flat round face designed to hammer chasing punches into medium-gauge metal and a 13mm, half ball for peening and riveting. If you’re working with a heavy-gauge metal, see the Fretz HMR-20, same face sizes but heavier so excellent when used on thicker metal. Fretz casts their hammer heads from 420 stainless steel and tool hardens them to 50 HRC. The handles are made from oiled hardwood shaped and weighted to balance the head perfectly. Made in Vietnam.
