"1Corner Rounder Punch 3 in 1 Cuts 4mm 7mm 10mm Corner RadiusesCreate perfectly finished paper crafts or scrapbooks with 3-way corner cutter.2meterial is ZBS+Zinc alloyStainless steel cutter blade is sharp enough for ensuring precision cutting for a neat and clean appearance.3Easy to Operate and Simple to Use: Choose your desired material and place it into the slot. Simply push the corner of your paper inside until its properly lodged against the guides and press the handle down. The corner is now accurately and sharply rounded.4Perfect for regular paper, EVA foam, foil, craft paper, basically thickness less than 2MM.Please use 70G-230g paper jam. If your paper is too thin,please use 2-3 layers.do not use the Sticky paper to avoid make the punch Get stuck5Suitable for cutting paper, photographs, scrapbooking, business cards or gift card. Small corner rounder punch is suit for using in office, school, home and photo studio."