Single Strand Sprocket, Bore Diameter 7/8 in, For Chain Pitch 3/4 in, For Number of Strands Single, Hub Type One Side, Material Steel, Maximum Bore Diameter 7/8 in, Number of Teeth 12, Outside Diameter 3.25 in, Pitch Diameter 2.898 in, Bore Type Fixed, Chain Number 60, Finish Black Oxide, For Pitch Type Single Pitch, Hub Diameter 2 3/8 in, Hub Projection 0.791 in, Includes Set Screws, Keyway Yes, Keyway Depth 3/32 in, Keyway Width 3/16 in, Length through Bore 1 1/4 in, Material Grade 1045