1" Diameter 1/4" Wide Keyseat Cutter Straight Tooth, American Standard # 808, High Speed Steel 2-1/4" Overall Length 1/2" Shank diameter, 2" Long Shank 1" Diameter +.015"/+.020" 12 Teeth 1" Diameter 1/4" Wide HSS Keyseat Cutter Straight Tooth, American Standard # 808, High Speed Steel, Made in the USA, Super Tool 40551