The Accu-Punch Hammer is a must have for gunsmiths & tinkerers. It has an innovatively designed ergonomic grip and balanced weight for precise control for tapping tiny pins and optimal power for those in need of a little "persuasion. " The driving heads can easily be switched between steel, brass, rubber, and nylon - giving you the best solution for the job at hand. We even included a Pin Alignment Tool to hold pins steady and get them started so you don't need to crush your fingers. This 4 in 1 hammer set is a professional quality gunsmith tool kit for safely and confidently performing gun repair and gun maintenance.