OESD's Perfect Punch tool makes creating holes in your project simple and effortless. Includes three sizes of punch tips: 2mm, 3mm, and 4mm. *OESD items may not be sold on Amazon, Walmart.com or any other marketplace website. OESD items may not be sold to unauthorized third parties that resell on a marketplace website.* 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.