Precision machined design provides tighter tolerances than OEM plates Lighter, thinner, and stronger than your factory adapter Custom made for your firearm and optic combination The C&H Precision plates are precision machined to the tightest tolerances on HAAS CNC machines and each plate goes through multiple quality checks before shipping. Since all the mounting hardware is replaceable, if any mounting hardware is damaged, it can be replaced without replacing the entire plate. Mounting screws included.