1，Corner Rounder Punch 3 in 1 ： Cuts 4mm 7mm 10mm bookmark cutter Corner Radiuses，Create perfectly finished paper crafts or scrapbooks with 3-way corner cutter. 2，meterial is ZBS+Zinc alloy，Stainless steel cutter blade is sharp enough for ensuring precision cutting for a neat and clean appearance. 3， Easy 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. 4、Perfect 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 stuck 5，Suitable for cutting paper, christmas card punch ,photographs, scrapbooking,wrapping paper cutter, business cards or gift card. Small corner rounder punch is suit for using in office, school, home and photo studio. 3-in-1 Mini corner trimmer Corner Rounder Punch R4/R7/R10mm Round Corner Trimmer Cutter for Card Photo Paper Laminating Pouches