1. Corner round board punch 3 in 1: cut 4 mm 7 mm 10 mm corner radius for perfect paper crafts or scrapbooking with the 3-way corner cutter.2. Made from ZBSand zinc alloy, the stainless steel cutting blade is sharp to ensure precise cuts and a neat appearance.3.Easy to use: select the desired material and place it in the slot. Simply push the corner of the sheet onto the guide until the sheet is properly wrapped and press down on the handle. The corners are now precise and sharp.4. Ideal for plain paper,EVA foam, foil, craft paper, basically less than 2 mm thick. Please use 70G-230 gsm card stock. If your paper is too thin, please use 2-3 layers. Please do not use sticky paper to avoid squeezing.5. Suitable for cutting paper, photos, scrapbooks, business cards or gift cards. The small edge punch is suitable for office, school, home and photography studio use.