Simple to use and ideal for anyone concerned about working in a clean and safe environment. It mounts to benches with a GRS style mounting bracket (Foredom's MA604 mounting bracket is included in case you do not already have a GRS bracket). The exhaust port accomodates a 2.25" hose and comes with an elbow to position your dust collector hose in any direction. The curved acrylic shield gives a clear view of your work and also helps to keep stray dust from flying at you. The inside of the fish mouth has a mounting bracket for the supplied wooden bench pin assembly. Use with MADC20 or other dust collector. Dimensions - Fish Mouth: Width 241mm at back, 152mm at front. Depth: 222mm front to back. Height: 229mm from bottom of metal exhaust port to back. Curved Shield: Width 203mm at top, 127mm at bottom. Height: 267mm.