Sprocket Bore Diameter 3/8 in For Chain Pitch 3/8 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 9/16 in Number of Teeth 11 Outside Diameter 1.5 in Pitch Diameter 1.331 in Bore Type Plain Chain Number 35 Finish Black Oxide For Pitch Type Single Pitch Hub Diameter 1 1/16 in Hub Projection 0.582 in Includes Set Screws Keyway Yes Keyway Depth 3/64 in Keyway Width 3/32 in Length through Bore 3/4 in Material Grade 1045