Marlinspike (; sometimes
marlin spike,
marlinespike, or the archaic
marlingspike/
marling-spike) is a tool used in marine
ropework. Shaped in the form of a polished metal cone tapered to a rounded or flattened point, they aid in such tasks as
rope for
splicing, untying
knots, drawing tight using a
marlinspike hitch, and as a toggle joining ropes under tension in a
belaying pin splice.