1、Metal knife edge for smooth cutting, the finished rounded corner is 5MM, which refers to the rounded corner radius of 5MM. 2、Mini trimming machine with lightweight and portable design, convenient to carry and use. 3、Cutting paper of 0.5mm thickness, and 4 sheets of A4 paper can be cut each time. Rounded corners are soft and no burrs which will not scratch your hands. 4、Small corner rounder punch suit for using in office, school, home and photo studio to sharp the round corners of cards and documents. 5、R5 rounded edges are excessively neat, no burr and no scraping design for your safety. 1 x Corner Rounder Punch Item Type: Corner Rounder PunchMaterial: ABS+PVCProduct Size: 9 x 6.4 x 3cm / 3.5 x 2.5 x 1.1in (manual Measurement, There May Be Slight Errors).Tips: 4 Sheets of A4 Paper Can Be Cut Each Time.Fillet Radius: Approx. 5mm / 0.2in