This item features: -Cutting Edge Material: HSS. -Price is for 1 Each. Model Code Model Description AACutting Diam:1 1/8 in [Max], No. of Steps:1, Shank Diam:1/2 in ABCutting Diam:1/2 in [Max], No. of Steps:1, Shank Diam:1/4 in ACCutting Diam:1/4 in [Min], 1 3/8 in [Max], No. of Steps:10, Shank Diam:3/8 in ADCutting Diam:1/4 in [Min], 3/4 in [Max], No. of Steps:9, Shank Diam:3/8 in AECutting Diam:1/4 in [Min], 7/8 in [Max], No. of Steps:3, Shank Diam:3/8 in AFCutting Diam:1/8 in [Min], 1/2 in [Max], No. of Steps:13, Shank Diam:1/4 in AGCutting Diam:13/16 in [Min], 1 3/8 in [Max], No. of Steps:10, Shank Diam:1/2 in AHCutting Diam:3/16 in [Min], 1/2 in [Max], No. of Steps:6, Shank Diam:1/4 in AICutting Diam:3/16 in [Min], 7/8 in [Max], No. of Steps:12, Shank Diam:3/8 in AJCutting Diam:7/8 in [Max], No. of Steps:1, Shank Diam:3/8 in AKCutting Diam:9/16 in [Min], 1 in [Max], No. of Steps:8, Shank Diam:3/8 in