This increases hardness (Rc 75-80) without increasing brittleness, which is measurably harder than high speed steel. The Nitro Heavy-Duty Construction Reamers have a Ferritic Nitro Carburizing surface treatment, which gives a hard, protective layer to the reamer.11/16 Spiral Flute Nut Shank NITRO Construction Reamer Body and clearance are gold and black surface treated for maximum lubricity..
designed for cutting thin wire or tubing as well as very thin light duty slotting.014" Face x 3/8" Hole x 99 Teeth hss tmx jewelers saw, 1-1/4" diameter x .HSS Import Jewelers Saw, 1-1/4" DIA x .