Instructables
Picture of Better X-acto knife handle
This is a silly one-liner, but here we go! 
One day I couldn't find the handle for my knife, and tried using a vice-grip instead. It's incredibly ergonomic! I'm not kidding. The regular ones are too small and put unneeded strain on the fingers. Definitely room to try making a handle from shape lock plastic or epoxy paste.
turbobug1 year ago
i have done this with razor blades when the handle has gone missing.