[1]: ) FEATURES: Type of shank: 6.35mm/ 1/4 inch hex shank ;Bits Size: 2.4PH0, 2.5PH1, 4PH1, 4.5PH1, 4PH2, 4.5PH2, 5PH2, 6PH2; Overall length: 75mm/ 2.95-inch ; Material: S2 Alloy Steel; Surface Treatment: Sandblasting.