This cutter has a plastic body and gripper. This is a high quality product. It has spring action for easy cutting of threads and yarns. Can also be used for garments, embroidery and as a multi use cutter and nipper. A great tool that saves you time and effort when working with threads.Tailored scissors and trimmers have brass handles for proper hold on fabrics. While blades of scissors are made up of funner steel, the blades of trimmers are made up of carbon steel. Scissors are used to cut through heavy fabrics like denim and leather; while trimmers are used for cutting threads and yarns. However, blades of trimmers and scissors are tapered from one end; blades of trimmers are rounded from bottom to prevent the fabric from snagging. . It saves time and effort. Bottom blade of trimmers is rounded to prevent snagging of the fabric. Handles of scissors are designed in such a way that they fit comfortably in hand.