The C&H Precision plates are designed manufactured and shipped from our small family owned business in Coastal Georgia. Each plate is precision machined to the tightest tolerances on HAAS CNC machines and each plate goes through multiple quality checks before shipping to our customers. Plates are made from 6061 aluminum. All mounting hardware is Stainless Steel. This plate is for slides that DO NOT LOSE the rear iron sight when the cover plate is removed. This plate requires a Romeo 1 Pro Optic Ready cut with RMR holes.