Screwback decorative spikes - 13mm (1/2"). Pack of 10. Use a 2-3mm drive hole punch - either 3777-01 or 02, or the second smallest on the Deluxe Rotary Punch 3240-00.
An easy addition to straps, boots, dog collars, biker jackets, The studs simply screw in place - for added security add a drop of superglue onto the thread before screwing together.