20 PC Tin Coated End Flute Mill Set 20 piece tin coated end mill set; Two and four flutes These four-flute single end mills are designed for slot, pocket, keyway, and profile cutting. Center cutting design allows mills to be used as drills. Made of M2 titanium nitride-coated high speed steel. Quantity: 1 ; Wooden storage case dimension: 10-1/4''L x 3-1/2''W x 4-1/2''H