Gagger, Clamps and Bellow
Gagger
It is a bent piece of wire and rod. It is usually used for reinforcing the downward projections of the sand mass in the cope.
Clamps
Clamps are made up of steel and are used for clamping the molding boxes firmly together throughout pouring.
Bellow
It is employed to blow away the loose or unwanted sand from the surface and cavity of the mold. A bellow is displayed in diagram.
Figure: Bellow