These tiny PCB sets make setting up a removable speaker pod or switch a breeze! At 1.67mm thick, they feel solid to work with and with the thick copper traces and gold gilding, you don't have to worry about damaging a pad or trace like you would on thinner PCB's. The OD on these is 9.95mm so a 10mm or 10.1mm holder should be perfect for securing these to a chassis or switch area holder.