3/4" Diameter 1/4" Wide Keyseat Cutter Straight Tooth, American Standard # 806, High Speed Steel 2-1/4" Overall Length 1/2" Shank diameter, 2" Long Shank 3/4" Diameter +.015"/+.020" 10 Teeth 3/4" Diameter 1/4" Wide HSS Keyseat Cutter Straight Tooth, American Standard # 806, High Speed Steel, Made in the USA, Super Tool 40541