Bi-metal hole saw 68 mm

Bi-metal hole saw 68 mm diameter, height 44 mm, drilling depth: 38 mm, application: metal, steel/Inox, cast iron, brass, aluminum, wood, thread: 5/8” x 18 UNF, made of HSS high-speed steel, for use with 56T754 adapter with pilot drill for bi-metal hole saws 32-152 mm, Hex, diameter: 68 mm, max rotational speed: steel: 130 rpm, stainless steel: 65 rpm, aluminum: 190 rpm, wood: 165 rpm, cast iron: 85 rpm, brass: 165 rpm.