1" Bore; Shaft Collar; Stainless Steel; 1-3/4" Outside Diameter; 1/2" Width; 1/4-28 X 5/8 Clamp Screw Size; One Piece Split

10MM Bore; Shaft Collar; Steel; 25.4MM Outside Diameter; 9MM Width; M3 X 10 Clamp Screw Size; One Piece Split

1/2-20 Bore Thread; Shaft Collar; Steel; 1-1/8" Outside Diameter; 13/32" Width; 8-32 X 1/2 Clamp Screw Size; One Piece Split Threaded

5/8-18 Bore Thread; Shaft Collar; Steel; 1-5/16" Outside Diameter; 7/16" Width; 10-32 X 1/2 Clamp Screw Size; One Piece Split Threaded