Protective Case for Drill

What do you do with inexpensive step drills after you take them out of the blister pack? These cases solve that. Modeled in the public version of onShape, I provide several sizes. The models downloadable and are somewhat parametric so that they can be easily customized for diameter and length. Models are here:
https://cad.onshape.com/documents/c4970b9b0cd0ad29b01d7188/w/dd634872dfb4fe764c13ca4a/e/8d121bf333bdfde7ebde2c34