These square jack mounting plates work great for both 1/4" jacks and volume/tone pots.I'll be using them to mount a volume pot and and output jack on a lap steel. I wish these came with mounting screws as well. They will work with standard pickguard mounting screws but you need to purchase screws unless you are replacing a broken plate or swapping plates for a different color on a guitar and reuse the screws... you will need to order some pickguard screws too.These are a solid choice and do the job however and everything should align as expected.