These high quality sprung clips are used to hold onto notes in an open 'bill fold' style of wallet. The clip springs open to release your money and then clips down again to hold the notes firmly inside the wallet.
A bill fold wallet is made very simply by cutting your leather slightly larger than the biggest notes you want the wallet to fit, folding your leather around the spring, and stitching the spring into the fold of your leather.
This is a shiny 'gun metal' plated clip, which is a dark silver/ black in colour.