Durable Alvin clear acrylic plastic cutting triangles feature inset stainless steel cutting edge on one side. Printed grid includes inch markings and centering lines. Ideal for both right and left-handed users. No-slip strips on one side for a stay-put grip, flip over for easy sliding. 30/60/90 and 45/90 degree triangles are great tools for studio, office, shop, school, home.