How do you dispose of other sharps, eg. shaving blades, etc?
Likewise, what are you doing with your rotary blades??
It might be best to check on what the regulations are for such, in your municipality.
Many keep a pill bottle and put them into it.
For me ....
I have a piggy bank that I "deposit" any needles, pins and rotary blades that are beyond use.
It'll be a long time before it will be filled .... and I have to figure out what to do with it then!