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

1-3/8" Bore; Shaft Collar; Aluminum; 2-1/4" Outside Diameter; 9/16" Width; 1/4-28 X 3/4 Clamp Screw Size; Two Piece Split

1-3/8" Bore; Shaft Collar; Steel; 2-1/4" Outside Diameter; 9/16" Width; 1/4-28 X 3/4 Clamp Screw Size; One Piece Split

1-7/16" Bore; Shaft Collar; Aluminum; 2-1/4" Outside Diameter; 9/16" Width; 1/4-28 X 3/4 Clamp Screw Size; One Piece Split

2-11/16" Bore; Shaft Collar; Steel; 4" Outside Diameter; 7/8" Width; 3/8-24 X 1 Clamp Screw Size; Two Piece Split