Stainless steel brackets and screws. On the matte side is a protective plastic with embedded holes. Looks good on the matte side and yes something like PITA to get the plastic off. I see a number of reviews saying they look used or have a crappy finish, it's protective plastic. But for the record, they're 0.037. " thick.
High-Quality White Plastic Flush Type Plugs for Industrial Hardware Applications
9 Review
Continental ContiVikingContact 7 195/65 R15 95T winter
21 Review
π 50 Pack of P MAP Maple Pocket Plugs
7 Review
π Enhance your Woodworking Projects with KREG P PIN Solid Wood Pocket Hole Plugs
8 Review