Made in the USA, the Milwaukee®HOLE DOZER™ Hole Saw features Rip Guard™, the strongest tooth form in the industry, backed by the Rip Guard™ Limited Lifetime Tooth Break Warranty. Each tooth is built with more steel behind the cutting edge for added strength. The Rip Guard™ warranty on tooth breaks is a first for the hole saw industry. The added tooth strength along with 8% cobalt give added life to the teeth, allowing for increased productivity on the jobsite, as well as continued hole quality.