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

1-1/2" Bore; Shaft Collar; Steel; 2-1/4" Outside Diameter; 13/16" Width; One Set Screw; 3/8-16 X 3/8 Set Screw Size; One Piece Solid