79 mm bi-metal hole saw

Bi-metal hole saw 79 mm, height 44 mm, drilling depth: 38 mm, suitable for metal, steel/Inox, cast iron, brass, aluminum, wood, thread: 5/8” x 18 UNF, made of HSS high-speed steel, for use with 56T754 pilot drill adapter for bi-metal hole saws 32-152 mm, Hex, diameter: 79 mm, max rotation speed: steel: 110 rpm, stainless steel: 55 rpm, aluminum: 165 rpm, wood: 150 rpm, cast iron: 70 rpm, brass: 140 rpm.