Cardboard Box Handles

I'm very good at re-using things, and when my PrintrBot came in a box that was small, had a good base to hold the printer in, and seemed to be made of decent cardboard, I resolved to not throw the box away and instead use it when I needed to transport my printer.

The handles I made are inspired by plastic handles that connect boxes that computer servers come in. The handles have a 90 mm x 25 mm hole that is perfect for my L/XL male hands. Feel free to resize them in one direction if you need the handle smaller or larger (too much will change the wall sizes too much - it's not parametric).