Amana tool SC450 2-PC Carbide Tipped 3-Wing Stile & Rail Flooring w/Nail Slot 3-1/4 D x 7/8 CH x 1/8 x 1/16 R x 1/2 & 3/4 Bore Shaper Cutter Set for 5/8 to 3/4 Material

Also known as stile and post shaper cutters.Build your own wood floors with these matched shaper cutter sets, which ensures perfectly aligned tongue and groove flooring strips. The unique rounded edge created by these cutters makes flooring fast and easy to install, while the nail slot helps prevent splitting.