First of all, this hammer will last you decades even with constant use. It's hard metal, but as advertised, you can spin 2x4 and your wrist won't go numb the next day. Made in the USA. For those who don't know what a frame hammer is, it's a hammer, but on the metal face there is a pattern in the form of honeycombs. This allows you to drive the nail in until the nail head penetrates the tree without affecting the tree itself. If you've ever seen someone pound the crap out of a 2x4 with a regular