Lion Professional stretcher plier

These fit in your hand very comfortably. Jaws spring open when you release.

The double fulcrum hinge multiplies the force of your hand to the jaws, so the canvas doesn't slip as you try to tack it down.

Jaws are angled towards the front edge, leaving a gap at the back of the jaws for excess fabric. The unique pivot is what gives you the power to help you pull it really tight.