Enhance your railing system with the Q-railing Square Profile Cross Bar Holder (Pass Through). This holder is designed exclusively for pass-through of the crossbar, featuring a single set screw for secure installation. Crafted to adhere to industry norms and safety code requirements, it's essential to consult a licensed engineer to ensure your railing design complies with local building codes. Sold individually, this product is perfect for those looking to optimize safety and aesthetics in their railing systems.