I've lost count of the number of things I use around the house that I've replaced, simply because I lost or broke a small piece of them. They were otherwise perfectly usable and could easily be kept around for years more if I could just find a spare part – like the handle for my manual food processor, the nose pads for my eyeglasses, and the trigger buttons on my game controller.

I also recently had to get a new trimmer because I lost the length guide – the comb-like attachment that slots in atop the blade that keeps me from trimming my beard too short. As it turns out, Philips just came up with a solution for that: free 3D-printing files to print my own spare parts for trimmers!