The hole saw blade is made of heat treated carbon steel for fast and clean cuts. High precision, smooth cutting edge makes the job done faster and better. It has stable mechanical properties, high wear resistance and high impact resistance, ensuring a long life. Hole Saw Kit is suitable for soft wood, thin PVC board, plastic but not metal, hard wood (density board, particle board and computer tables). 5 Pcs Hole Saw Kit including the most popular hole saw sizes on the market:1-1/4" inch, 1-1/2" inch, 1-3/4" inch, 2" inch diameter in a pack. High speed steel teeth for fast and clean cuts. Tooth design allows for a more aggressive cut. Covers most popular hole saw sizes on the market. High speed steel teeth for fast and clean cuts. Tooth design allows for a more aggressive cut. Covers most popular hole saw sizes on the market.