Both professionals and hobbyists, rejoice! The Excel Blades’ Excel Blades Small Square Gouge – 2 Pack is set to become your next favorite tool! This 2 pack of precision blades are made from durable high quality carbon steel,can be used for carving linoleum, and other hard and soft substrates,and features a square profile.The item # 20320 is made of carbon steel. This products works in conjunction with Excel Blades’ medium and heavy duty knives; K2, K5, & K6.It comes with 2 per pack.