m0.4 hob cutter.The material is HSSIt is old stock, it has some stains from dried oil.Never used, Excellent condition.Weight : 15grModule: 0.4Arbor mount: Φ10x8mmNo keywayWidth: 7.5mmExternal cutting diameter ( largest ) : 25mmTeeth on each rotation : 10 cuts / rotationTeeth on width ( axis ) 7 teeth width Sharp, ready to cut.Returns accepted.