A utility knife I made for a class. The steel knife blank was provided and required sharpening and hardening. We were also tasked with designing a handle. I used carbon fiber nylon to 3D print a handle.
Chamfered front allows for comfortable thumb placement
Stubs provide additional support within the knife blank. The slight tapers ensures a tight fit
Hexagonal holes hold the nuts in place
Countersunk holes keep the bolts flush