Pretty good price for a non-magnetic cover that's well made and fits perfectly on a Gibson humbucker. When you install them, prep the inside edges on each side of the cover by scuffing with sandpaper and wiping with ancohol. Do the same with the edges of the pickup's base plate in the middle of each long edge (this scuff/cleanup allows solder to stick). Press the pickup into the cover all the way and apply a small clamp to bring the sides of the metal cover into contact with the base plate. Apply a HOT soldering stick and some rosin-core (electronic) solder to make a little solder bridge at the joint about 1/4" wide. Allow it to cool and remove the clamp. Done.