Locking Canvas Plier
Make a locking canvas plier to strech painting canvas and other fabrics.
Buy a Locking Plier
First buy a locking plier.
these can be found in any hardware store might also be called welding plier.
Modify
Cut four pices of 8 mm thick flat steel bar in roughly 4, 2 and 8 cm long parts.
Weld these to the locking plier in as the image shows.
Strech Canvas
Use the tab on the plier to lock it while holding the canvas.
Strech the canvas and release.