KATA Hole Saw Set 20PCS Hole Saw Kit with 3/4"-6"(19-152mm) 13PCS Saw Blades,2 M

With carbon steel and heat treated,this set is suitable for the most popular size of ordinary wood, thin PVC board and plastic, which is high precision,portable and safety. Ideal for cutting soft wood, thin PVC panel and thin plywood. But not for metal and hard wood.