Amazon.com: Timsec Canvas Stretcher Pliers, Upholstery Staple Remover and Tack Puller Tool Combo, Professional Canvas Pliers with Spring Return Handles, 4-3/4" Wide Grip, for Stretching Clamp Art Oil Painting
How to stretch webbing with a monkey wrench
Amazon.com: Osborne Heavy Duty Canvas, Leather & Webbing Plier #250 : Tools & Home Improvement