Turn Button Cutter for common sense/twist lock fasteners is designed to cut the hole and prong openings required for setting standard metal common sense eyelets into fabric. This Turn Button Cutter is CNC machined from cast alloy with hardened steel pins and cutter for long life of use. A soft surface cutting pad underneath the fabric being punched and using a mallet is recommended for striking the punch to prevent cracking or mushrooming of the cast alloy component.Sold each.