FLAMENCO CAJON Use it to adjust the tension of the cajon strings and the screws on the cajon's front plate to alter its sound. Its dual-head screwdriver and hex wrench give you all the tools you need. The wide-brimmed Meinl logo is designed for a firm grip. Adjust the tension of the drawer string and the screws on the drawer face plate Double-headed screwdriver and hex wrench Wide wing Meinl logo designed for a firm grip