Hinged Clamps, when attached to a table top, hold the frames in position to make an inexpensive printing press.

You can use a stick, a block of wood or a weighted rope to hold the frame up while changing substrates.
 
Features:
1. Easy to use screen hinge clamps
2. Constructed from steel
3. Holds all wood or metal screens from 5/8" to 2" ( 1.5 to 5 cm ) thick.
4. Locking action firmly holds screens in place for positive registration

5. Allows fast changeover between jobs