Sometimes, you just need to smash something. Whether you’re taking down a wall during a renovation, moving metal to forge a knife, breaking up concrete for a larger backyard, or showing a 1990s printer who’s boss, taking your frustrations out on an inanimate object can be a cathartic experience that can result in the creation of something new or better. But what if you could personalize your demolition hammer? What if you could replace the traditional hammer head with a metal replica of your own fist? In a recent video, YouTuber Bonn demonstrates how to construct a custom fist hammer.