Bonny Doon Flat 95-Durometer Urethane Insert for 0.20 kg. or 10-oz. Bonny Doon Forming Hammer

Designed specifically for either the 7-oz. (110910) or the new smaller 10-oz. Bonny Doon urethane hammer (110921), this insert is threaded to be interchangeable with the flat-face, 80-durometer insert of the hammer, giving you a harder, 95-durometer face for your forming needs.