Myerchin Knife Marlin Spike A009 with Sheath Marlinspike used by sailors to undo ropr knots and bends Some of Marlinspikes uses are As levers to open strands of laid rope when forming eyes or inserting items into the lay. To untie knots that have tightened under tension. As a lever or handle to tension marline or rope using a marlinspike hitch, much tighter than by gripping the line with the hand alone. As an improvised weapon against hostile boarding parties Myerchin, Inc. has been dedicated to the production of quality rigging gear for over a quarter century. Our products have been used and tested all over the world by professionals and dedicated seafarers. Our testing grounds have always been the sea... the harshest environment on earth. We proudly supply the US Navy and US Coast Guard through the GSA along with several NATO Navies. Sailors who become proficient at knot tying, splicing, and sewing using the marlinspike are said to have mastered marlinespike seamanship, earning them the right to be known as marlin spikes or marlinspike seamen. Professional quality marlinspike. Used by sailors, commercial tug boats, Coast Guard, Navy, divers, participants in all extreme sports.