1 vice on the work bench, 1 vice in railway room, 1 vice spare in reserve. 2 Minicraft drills, 3 or 4 Xuron diagonal/track cutters, numerous knife blades and handles, can't always be bothered to change blades so keep most used in handles amd a box of spare blades. Lost count of screwdrivers, different blades and sizes up to one I call my graunching tool, about 18" long 3 temperature controlled soldering irons one on work bemch 2 in railway room (one each side). 3 Tweezers in various shapes and sizes as well as normal household hammers, pliers, saws Etc etc!
A Unimat 12" lathe + milling attachment, not been used in years, not scratch built any locos recently, only hacks and kit bashes.

Did I say I use my Xuron track cutter to trim an errant baby toenail?
It has a fungal infection in it and grows like an eagles claw if I don't keep it under control.

Does anyone use those mini-vices that fly fishers use to make their own flies ?

I imagine that jewellers also have their own special vices that might be useful for us n gauge modellers ?