STRONG AND TIGHT FRAME CLAMPS: The clamp is sturdy and clamps your canvas with ease. The plastic interior of the clamps are grooved to hold your canvas firmly between the clamps. Our clips grip your canvas frame without tearing or damaging it when stretched over the stretcher frame. They offer both power and precision, making them an essential tool if you're working with paintings on canvas. RUBBER HANDLES: The handles of the pliers stretcher have a good grip. They are comfortable and do not hurt your hands or wrists. Perfect for artists who suffer from arthritis. The handles are ergonomic and mold to the shape of your hand. To make them easier to use, the handles have a spring. Ideal for very large canvases, as you can stretch the painting canvas faster and with less effort. ESSENTIAL FOR ARTISTS: Our clamps are perfect for attaching thick, thin, large and small canvases to a canvas painting frame. Remove an old painting from a stretched canvas for example. They hold your canvas without damaging or stripping the edges. Use them with screen, needlepoint, webbing, leather and vinyl material. They are used to repair the upholstery of chairs or cars. Attach the diamond painting frames on canvas and the art numbers.