Single Strand Sprocket Bore Diameter 3/4 in For Chain Pitch 1/2 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 3/4 in Number of Teeth 11 Outside Diameter 2 in Pitch Diameter 1.775 in Bore Type Fixed Chain Number 40 Finish Black Oxide For Pitch Type Single Pitch Hub Diameter 1 3/8 in Hub Projection 0.591 in Includes Set Screws Keyway Yes Keyway Depth 3/32 in Keyway Width 3/16 in Length through Bore 7/8 in Material Grade 1045