Make a locking canvas plier to strech painting canvas and other fabrics.
Step 1: Buy a Locking Plier
First buy a locking plier.
these can be found in any hardware store might also be called welding plier.
Step 2: 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.
Step 3: Strech Canvas
Use the tab on the plier to lock it while holding the canvas.
Strech the canvas and release.