11Pcs Hole Saw Cutting Set Kit Drilling Tool Wood Metal Cutter Mandrels Saws Core Drill Bits Woodworking Carbon Steel Professional 11-Piece 19-64mm Metal Alloys Wood Hole Saw Cutting Set Most users prefer these metal alloy wood hole saw for the majority of their work because it is compatible with a wide variety of materials. It also cuts faster and smoother and with reduced vibration due to the variable pitched teeth. It will easily cut through softer materials, such as wood-based items and plastic. The type of high speed steel chosen by the hole saw manufacturer will contribute greatly to the performance of the hole saw. Professional 11 pcs Hole Saw set 11 pcs Hole saw Kit Circle Wood / Timber Cutter Round Plaster Hole Saw 19-64mm. All the products in this kit are made of #50 premium carbon steel and processed with high frequency heat treatment. Convenient design: it has been well organized in a convenient plastic storage case. Helping you easy carrying out for working. includes hex key and installation plate Carbon steel material - high speed steel teeth for fast and clean cuts, special gear design makes the hole more accurate Package Included 8 x Drill bits-19mm-64mm Metal Alloys Wood drill set 1 x Mandrel 1 x Drive plate 1 x 2.5mm Allen key