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. SPECIFICATION: Material: Mild Steel. All mounting hardware is Stainless Steel Finish: Plates are Electro Deposition Painted - Black INCLUDED: Qty 1 - Optic Plate Qty 3 - M3 x 6 MM FH Plate Mounting Screws Qty 3 - 6-32 x .250 M3H Holosun 507C V2 Optic Mounting Screws Qty 3 - 6-32 x .285 M3H Holosun 407C X2 / 507C X2 / 508T X2 / 508T V2 / 507 Comp Optic Mounting Screws Qty 3 - 6-32 x .335 M3H Trijicon RMR / RMR HD / SRO Optic Mounting Screws Qty 3 - 6-32 x .365 M3H CHPWS EDC XL / COMP / COMP MAX Optic Mounting Screws Compatible FirearmsCZ P-10 C, CZ P-10 F, CZ P-10 F 45, CZ P-10 S, CZ P-10 V4 MIL / LEO Compatible OpticsC&H COMP, C&H Comp Max, C&H EDC-XL, Holosun 407C, Holosun 507C, Holosun 507Comp, Holosun 508T, Osight X, Trijicon RCR, Trijicon RMR, Trijicon SRO