Our high-visibility plastic markers let you know how much line you've payed out, so you can set the correct amount of scope.Safe anchoring requires the right amount of scope on your anchor rode. Most often, a five-to-one or seven-to-one scope allows for secure holding. How do you determine how much anchor line you have payed out Our Anchor Rode Markers are a simple, easy-to-install and valuable tool, at an economical price.Made from reinforced vinyl, color-coded green, red and yellow, with depths marked in increments of 30'. To install these on your 300' rode, you'll need to measure the rode. Then, using a fid or marlinespike, pry the three-strand-line apart and insert the markers, as shown in the video above. SpecificationsNumber of Markers: Nine markers in the packCompatible Rode: Sized for 3/4" three-strand lineNumber of Flags: Three green, marked 30, 60, 90; three red, marked 120, 150, 180, three yellow, marked 210, 240, 270; can be placed every 3', 30' or even 30 fathoms--your choice.