Electromagnetic interference/RF shields from Photofabrication Engineering feature snap-on, snap-off covers that allow easy access to components within the shields. The shields protect components from EMI/RF interference and environmental hazards while providing electrical grounding. Standard forming tools in any size and shape are used to create covers that attach onto a fence yet can be removed and replaced easily. The photochemically etched fences have grooves extending approximately 50% into the material thickness to enable the custom spring finger designs to snap into them firmly. Circuit-board shielding applications include one-piece or two-piece construction; standard base materials of brass, tin, tin-lead, nickel, copper, and cold-rolled steel; and nickel-silver base material.