OESD's Perfect Punch tool makes creating holes in your project simple and effortless. Three tips, (sizes 2mm, 3mm and 4mm) are stored in the end of the Perfect Punch. Instructions for use: - Place project on self-healing cutting mat - Insert desired tip punch size into your tool by unscrewing the collar, placing the tip and retightening - Place cutting tip on desired hole location - Press straight down with firm, even pressure to create a clean and precise hole