Snap-On Blue-Point BPN24B, 24 Oz Ball Peen Hammer
I've given Snap-On first place for their high quality reputation. This particular hammer is 24 ounce, although they have them ranging from 8 ounces, through 23 ounces. I like a little heftier hammer for the extra impact that it gives. Considering that the purpose of a ball peen is shaping metal and metal doesn't cooperate well with that, I think the extra weight is justified. This one comes with a fiberglass handle, providing long life and some shock resistance. Additionally, there's a rubber sleeve over the handle, for additional shock protection. Snap-On also provides ball peen hammers that have wooden handles. Made in the USA, this hammer is backed by Snap-On's lifetime replacement warranty.