Model Shapeways Hull Planking Clamps Laser cut plywood planking clamps eliminate unsightly holes in you blukheads, and you won't waste time screwing in and removing threaded planking clamps. They also hold you planks firmly in place while you glue, drill, measure and taper. Each clamp is 1 square, and includes a metal screw with wing nut and two 1/16 diameter Brass support rods. Assembly required.Set of 6. Use with bulkheads less than 3/16 thick