These are 3/8" thick solid aluminum Spacer for the CG1 Tactical Wallet.
Spacers are threaded to fit the standard screws so nothing extra is needed to replace them other than a small amount of BLUE Thread locker.
***NOTE*** Card thicknesses vary, some have raised numbers and letters some don't, total number of cards held might vary from person to person, the 3/8" standard spacers allow 8 to10 cards.
Bought this to replace the spacers that come with the battlebox wallet. It fits greatly and very comfortably fills in the bracket space. My only wish is that it came with a tool to replace the screws. I don't have any torx tools to replace the screw. The product itself is great