This 21-piece hole saw kit by Prostormer includes 13 blades, 2 mandrels, 2 plates, and 3 drill bits, making it a comprehensive set for anyone who needs to cut holes in various materials. The blades are made of high-speed steel and carbide, which allows them to cut through wood, PVC, metal, and other materials with ease. The kit comes in a sturdy carrying case that keeps everything organized and easy to access. The case also makes it convenient to transport the set to various job sites. The incluSee full review