Features:*Free 4 different diameters of milling cutter dust plate*Free screws*Positioning chamfer.*A complete set of accessories is easy to install.*Scale mark, laser scale, not easy to wear, high processing accuracy.*Multi-function installation, smooth worktable, multiple holes installation.*Thickness processing, aluminum alloy material, not easy to damage.*A machine in place, a necessity for woodworking trimming and slotting.Specification:Board length: 235mm(9" )Board width: 120mm(5" )Board thickness: 7.5mm(1/3" )Inner screw hole distance: 70 * 62mm(2 3/4" * 2 1/2" )Outer ring length: 58mm(2 1/4" )Inner ring diameter: 42mm(1 1/2" )The outer diameter of the rubber ring is: 31mm, 31mm, 13mm, 7mm(1 1/4" ,1/2" ,1/4" )Package Include:Free 4 different diameters of milling cutter dust plateFree screws1 x Router Table Insert PlateNote:Please be carefully check the goods appearance, size, shape and then compare your original goods before ordering, thank you.Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.Since the size above is measured by hand, the size of the actual item you received could be slightly different from the size above. Please don't mind, thank you!