Shaft Collar, System of Measurement Metric with Inch Bore, Bore Type Round, Bore Diameter 5/8 in, Bore Thread Size Not Applicable, Collar Outside Diameter 34 mm, Inside Height to Flat Not Applicable, Clearance Diameter 39.3 mm, Collar Width 13 mm, Collar Material Titanium, Keyway Width Not Applicable, Collar Material Grade Grade 5, Keyway Depth Not Applicable, Thread Direction Not Applicable, Center to Lever Top Not Applicable, Collar Construction 2-Piece, Screw Material Titanium