Milwaukee HOLE DOZER Bi-Metal hole saw's new 3.5 TPI tooth offers the longest life in metal applications. It features RIP GUARD, a tooth design built with more steel behind the cutting edge for maximum durability. RIP GUARD supports the Limited Lifetime Tooth Break Warranty applied to all Milwaukee HOLE DOZER Bi-Metal hole saws. The All-Access slots feature solves the frustration of plug removal for less downtime and more productivity between holes. The latest slot design gives increased pilot visibility for accurate placement and faster chip ejection keeping cuts cool. The HOLE DOZER™ Thermoset anti-friction coating allows for cooler and faster cutting. optimised for cordless tools, the HOLE DOZER hole saw deliver 25% more holes per charge and can take on all general-purpose applications.