In the 80s a lot of screwdrivers and nutdrivers, notably from Xcelite, Vaco and Craftsman were made of a plastic called cellulose acetate butyrate or CAB for short. They used it because it was chemical and shock resistant. THAT is the stuff that smells like barf. I have quite a few pieces. It often forms a white coating on the surface that is mistaken for mould. It can be scrubbed off but it comes back. I was not aware anyone was still using it for tool parts. It is a slightly rubbery plastic that is usually some transparant color. Sent from my SM-G900V using Tapatalk