What makes a tone pot a tone pot, is a tone pot 250K and volume 500K or is it how the pots are wired?

Also when should i use 250k and when should i use 500k?
I thought that one was a linear pot and the other was a log but I could be mistaken.
Probably best to ask in the Guitar Building & Customizing forum.
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gear in profile
It's the way they are wired. Tone pot has a capacitor added. 250k are usually used with single coil pickups and 500k with 'buckers.