Description Made in the USA with global materials, the Bi-Metal Hole Saws last up to 50% longer and feature patented tooth forms that help deliver fast cuts and long life when 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 pass.Up to 50% longer life: patented tooth forms optimize chip removal for efficient drilling and long life, vs. prior generation DEWALT bi-metal hole saws cutting black pipeFast plug ejection: large, continuous slot provides leverage for easy plug removalVersatile drilling performance: high-speed, steel cutting edge effectively drills through wood, metal, and plastic