Profile: Machine-Pro Products, LLC offers steel DIN rail, aluminum DIN rail, DIN rail stand-off accessories, wide finger wiring duct and thin finger wiring duct in both white and gray, wiring duct accessories, cutting tools, cable (zip) ties and grounding bars. Thin finger or high density wiring ducts are manufactured with fingers that are one-half the width of the standard finger wiring duct. This makes them an ideal choice for high density wiring such as terminal blocks and relays. The snap off fingers can easily be removed to create larger openings to create any size opening. The fingers are also tapered inwards at the top to retain wires even with the covers removed.