DEWALT D180002 - Hole Saw Kit, Standard Electrician'S Set, Bi-MetalMade in the U. S. A. with global materials, these Bi Metal Hole Saws last up to 50% longer* and feature patented toothforms that help deliver fast cuts and long life drilling through wood, metal, and plastic. Their large, continuous slot provides leverage for easy plug ejection and removal. The durable, bi metal construction provides the versatility to drill a range of materials and a deeper saw design allows for cutting 2 by dimensional lumber in one