3/8" Diameter 3/32" Wide Keyseat Cutter Straight Tooth, American Standard # 303, High Speed Steel 2-3/32" Overall Length 1/2" Shank diameter, 2" Long Shank 3/8" Diameter +.015"/+.020" 6 Teeth 3/8" Diameter 3/32" Wide HSS Keyseat Cutter Straight Tooth, American Standard # 303, High Speed Steel, Made in the USA, Super Tool 40530