2PCS Share Goo Metal Flat Humbucker Cover Electric Guitar Pickup Frame Mounting Ring with Screws (Black)

Metal. Better than the old plastic mounting ring that came with the EMG 85 back in the 80s.

I upgraded the pickguard on my Donner thin line guitar and the cutouts were larger than the pickups that came with the guitar. I attached these and the guitar looks awesome

These are fine if the thickness works for you (they are thin).The screws that come with these have smooth shanks for the top 3-4mm. That means if you drill the right size pilot hole for the threads, it will be a little tight for the top of the shank. That's important because these are thing, which means you will likely need to bury the whole screw. Since the screws are so small, they will thus SNAP. Really a bad outcome when it means you have a metal threaded shaft now embedded in your precious guitar body right where you need to sink a new screw. So drill your pilot hole, and then go one drill bit size up and drill a larger hole for the top 3-4mm and you will be fine.

Very nice pickup rings great for guitars with flat surfaces

I haven't actually used these yet. I'm building a Telecaster with humbuckers. They look like they are what I needed but not sure yet how the metal will be. Will it cause a static problem? etc.

I used these in a HSH Stratocaster build, they are very low profile, and great addition to my build.

They did not fit my guitar.

I installed these on a B.C. Rich Mockingbird. Fit was very good and improved the appearance of the guitar greatly.