Relton has been manufacturing high quality brazed-carbide hole saws in the U.S.A. for over 50 years. Each hole saw has actual carbide teeth brazed into the steel body. Different applications require different hole saws. Each series is engineered to cut a specific material. All can be used dry or wet, hand-held or in a stationary drill. All can be re-sharpened or have teeth replaced as needed. 2"Drilling Depth Standard Pilot: Carbide-Tipped Standard Shank Length: 3"