This product is a set of two front upper control arms with ball joints for Chevy Blazer S10 and GMC Jimmy S15. The mounting style is bolt-on, and it comes with all necessary mounting hardware included. Made of steel, these control arms feature a cotter pin hole for added security. They offer standard duty performance, easy replacement, and 100% accuracy of fit. The parts have OE/OEM part numbers 15661507 and 15661508, and are manufactured in China. They are designed for specific vehicle fitment and are not universal.