Shopsmith Woodworking Power Tool Accessory Upgrade 4 in Centerset and built in lugs simplify installation Item Weight:.625 and built in lugs simplify installation and create consistent 1 16 in I adore how the sturdy 22 gauge steel construction not only supports your heaviest tools but also elevates the entire workspace aesthetic shaping and drum sanding just like a new Mark 7 Enjoy the added safety of under table routing and shaping keeping your hands out of harm's way Work more conveniently with under table operations when routing or shaping an interior cut out area since you don't have to retract and reset your bit or cutter