The Big Fish is an excellent rope or netting cutter, an ideal addition to the safety on boats and ships. The the Big Fish also has a shackle key located on the tail for emergency situations. The 9mm “mouth” opening can cut rope up to 12mm diameter. Alternatively it can be used in other sports that use ropes such as abseiling or in warehouse environments for opening packaging. The risk of an injury from the knife is minimized due to the design of the blade housing. It is almost impossible to cut yourself accidentally.