This Stagg PUSHPOT500A is ideal as a volume control for guitars with humbuckers. Thanks to the handy push-pull system, you can assign a second function to it.
The Stagg SP-POT500B is a linear potentiometer with a 500k resistor. It is therefore perfect as a tone control for a guitar with humbuckers.
Sometimes you want a bit more sustain in your guitar. The easiest way to manage this, of course, is to replace the saddle with a variant made of bone. The Stagg SP-SACL-BONE is one such, with pre-made slots.