Universal spring anchor bracket pair, left and right hand, 8-gauge steel. Those bolt to the header above the door and anchor the stationary end of the torsion springs. They fit springs with inside diameters from 1-3/4 inches up to 6 inches, which covers just about every residential and light commercial torsion spring out there. When the anchor is cracked or the bolt holes are wallowed out, the spring can shift under tension and that is a dangerous situation. Heavy 8-gauge steel on these. Sold as a left/right pair so you get both sides. Confirm your spring ID falls within the 1-3/4 to 6-inch range.