[Heavy Duty Canvas Stretcher Tool]: Use professional canvas stretching plier for securely holding and stretching a canvas over a frame.Mated rounded teeth for secure, no-slip gripping.And they are also handy for preparing leather, webbing and other fabrics for use in furnishings like repairing the chairs and other decor.[4" Extra Wide Jaw with Serrated Rubber Grippers]: Increase the jaw width by 4 inches suitable for stretching large frames, like the size 20"-24".With rubberized inside grips, canvas pliers can hold the canvas firmly without damaging the surface, avoid tearing and accelerating the stretching process, saving both time and labor.Especially for big sized or huge paintings, like the size 20"-24".[Comfortable Operation with Spring Loaded Action]: Crafted from durable metal, this canvas stretching pliers features heavy-duty spring return handles that make stretching tasks a breeze.With the innovative design of a spring return handle, the detachable spring can be easily removed and installed for added convenience.[Non-slip Handles]: Soft red rubber covered metal handles ensure easy comfortable grips feelings and non-slip grip, allowing you to draw with piece of mind.[For Stretching Usage]: Whether you're a painter, an art student, or work in a framing shop, having these canvas stretcher tools at hand is essential.Canvas stretch tool is also useful for artists, photographic printers, studios, classrooms, and when working with large-scale canvases.