Description of Vaughan 581 08 Rawhide Face Hammer Diameter
Malleable iron heads have tapered sockets for the replaceable faces. Rawhide faces are compressed and thoroughly seasoned for uniformity and durability. Face diameter 1 -Inch. Weight: 3/4-pound. Length 9-Inches.
I never knew they existed until I watched some videos from Oxtoolco. They offer more power than a regular hammerless hammer and seem immune to wear (at least as far as I'm going to use them).