The Calmark Birtcher part 41-10-LF-M is a high-quality Gold Chem Film Wedge Lok PCB Retainer designed for reliable and secure fastening of printed circuit boards (PCBs). With a 5-inch length and 5.71mm expansion, this retainer ensures a tight and precise fit, preventing any movement or damage to the PCBs during operation. Crafted from durable aluminum alloy, this retainer offers excellent strength and corrosion resistance. Its gold chem film finish provides additional protection against wear and tear. Ideal for various electronic applications, the Calmark Birtcher 41-10-LF-M offers superior performance and long-lasting durability.