12MM Bore; Shaft Collar; Steel; 28MM Outside Diameter; 11MM Width; M4 X 12 Clamp Screw Size; One Piece Split

1-1/4" Bore; Shaft Collar; Stainless Steel; 2-1/16" Outside Diameter; 1/2" Width; 1/4-28 X 11/16 Clamp Screw Size; Two Piece Split

3/4-16 Bore Thread; Shaft Collar; Steel; 1-1/2" Outside Diameter; 1/2" Width; 1/4-28 X 5/8 Clamp Screw Size; One Piece Split Threaded

11MM Bore; Shaft Collar; Aluminum; 28MM Outside Diameter; 11MM Width; M4 X 12 Clamp Screw Size; Two Piece Split

12MM Bore; Shaft Collar; Aluminum; 28MM Outside Diameter; 11MM Width; M4 X 12 Clamp Screw Size; Two Piece Split