Round corner punch R4 R7 R10 Corner Cutter for Paper Craft, Scrapbooking ,Laminate, Photo Cutter, Card Making and DIY Projects. 1,These have three different rounded corners so they are good for a variety of paper crafts. 2,You can put nice corners on homemade cards, envelopes, stationery, photos, scrapbook pages and more. 3,The blades cut evenly and cleanly and are easy to sharpen with aluminum foil. How to use paper corner rounder , It cuts corners flawlessly once you get the hang of placing the angle correctly. As long as you line up the corner correctly it will cut it no problem 1，it's best to flip the punch upside-down so you can see on the bottom how the paper is aligned with the punch parts. 2， Insert the corner of the paper until it stops and press the button. You can’t do it wrong if you try. 3，Handy tool but paper has to be carefully push in to it or it doesn't cut enough edge off. Cuts 4mm 7mm 10mm Corner Radiuses 4,It can press about 160 grams to 180 grams of paper 5, It has a non-slip base and the lever works very smoothly. 6.The paper can't be too thin. If you are using paper that's on the thinner side and you aren't getting smooth cuts, try stacking 2 or even 3 sheets. Easy to use Color: White + Blue Rounder EVA Non-Slip Design 1, Little corner cutter. Compact, very lightweight and portable, excellent value,Easy to cut different kinds of corners. 2,Sturdy and sharp.Heavy duty construction and Compact,accurate and clean cuts.