My surgeon didn't use a scalpel: I was having a no-scapel vasectomy (NSV).
This doesn't mean there is no incision, nor any cuts, only that they are not done with a sharp knife.
Apparently two instruments specially designed for the procedure are used: 1. an electrically powered cauterising stick (some kind of fore-runner to the light sabre); It's the black-handled tool on the left. 2. A fancy shaped clamp; it has scissor-like handles, shown on the right.
The only disconcerting observations are (A) some smoke and sparks from your scrotal hairs and skin (B) the smell of burning flesh.
The good news is that it's as painless as ordering a chargrilled pork chop, for which I have curiously developed some empathy.