m0.8 hob cutter.The material is HSSIt is old stock, it has some stains from dried oil.Never used, Excellent condition.Weight : 15grModule: 0.8Arbor mount: Φ13x16mmkeyway:3mmWidth: 10mm+External cutting diameter ( largest ) : 30mmTeeth on each rotation : 10 cuts / rotationTeeth on width ( axis ) 5 teeth width Sharp, ready to cut.Returns accepted.