Sprocket Bore Diameter 5/8 in For Chain Pitch 3/8 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 5/8 in Number of Teeth 35 Outside Diameter 4.39 in Pitch Diameter 4.183 in Bore Type Fixed Chain Number 35 Finish Black Oxide Hub Diameter 2 1/4 in Hub Projection 0.832 in Includes Set Screws Keyway Yes Keyway Depth 3/32 in Keyway Width 3/16 in Length through Bore 1 in Number of Set Screws 2