Felji 11-Piece Hole Saw Kit 3/4 to 2 1/2 Inch Set for Woodworking Sheet Metal Plastic HOLE SAW KIT INCLUDES: 8 carbon steel heat treated hole saws; 2 mandrels; Allen wrench; and storage case SAFE AND DURABLE: Carbon Steel, Heat Treated; The special gear design makes the hole more accurate; High speed steel teeth for fast and clean cuts; Suitable for wood and thin sheet metal Covers most popular hole saw sizes on the market; It's perfect to make any holes you need.High precision, smooth cutting edges, especially impact resistance, wear resistance, cutting depth 25 mm. Hole saw blade sizes: 3/4", 7/8", 1 1/8", 1 1/4", 1 1/2", 1 3/4", 2" and 2 1/2" inches Hole saw kit is suitable for wood and thin sheet metal.