Model Shipways Set of 6 Hull Clamps for Bulkheads 3/16" or thicker MX104 - ON SALE 42% OFF! Set of 6 Hull Clamps for Bulkheads 3/16" or thicker Laser cut plywood planking clamps eliminate unsightly holes in you blukheads, and you won't waste time screwing in and removing threaded planking clamps. hold you planks firmly in place while you glue, drill, measure and taper.