This stainless steel J-clip has a 1/4" opening and is commonly used to install vinyl straps on Woodard's Ionian model patio furniture. Two clips required for each strap. The straps should cut 10% to 15% short of their final length on the frame. Holes should be placed about a 1/4" from the end of the strap. You will heat the straps in near boiling water and stretch them across the frame from clip to clip.