HS Series Head Only has a 1.00 Inchin Drill Depth. It includes: Carbide Cutter Head Only. Recommended For: Carbon Steel, Cast Iron, Stainless Steel, Aluminum, Hard Rubber, Titanium, and Formica. 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. All are made to be used dry or wet, hand-held or in a stationary drill. If your job requires large number of holes, lower your cost per hole with a Relton hole saw. If you burn up high-speed hole saws, or bi-metal saws aren’t tough enough, then a Relton Saw is for you. The HS Series are cost effective and can be inexpensively resharpen and the teeth replaced as needed. Special order in just about any diameter, drill depth or back-plate design.