19 mm bi-metal hole saw

Bi-metal hole saw 19 mm, height 51 mm, drilling depth: 38 mm, suitable for metal, steel/Inox, cast iron, brass, aluminum, wood, thread: 1/2” x 20 UNF, made of HSS high-speed steel, for use with 56T753 pilot drill adapter for bi-metal hole saws 14-30 mm, Hex, diameter: 19 mm, max rotation speed: steel: 460 rpm, stainless steel: 230 rpm, aluminum: 690 rpm, wood: 680 rpm, cast iron: 300 rpm, brass: 600 rpm.