tools that stink
Here is the definitive answer to most tools:
The smell of the Xcelite screwdriver handles is because they are made of a plastic known as cellulose butyrate. One of the components of that is butyric acid, which is the stench of rancid butter and vomit. So that's why they smell, decomposition. I've smelled real butyric acid, and oh my god does it stink to high heaven. (My high school chemistry teacher used some to punish some after-hours users of his classroom who left it a mess. Whole wing of the school stunk for weeks. PU!) I have a small Xcelite toolkit in a blow-molded case. We call it the "baby vomit toolkit."
By the way, I did soak them in Clorox overnight and the smell is still there. Its the Plastic that stinks.