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