Studio Ocean Mark End Knotter EK55HDIn order to finish FG and PR knots, one needs a tool to not only set each half hitch by tightening but to hold the line securely while doing so, look no further than the Studio Ocean Mark end knotter.a. Extra-Thick Aluminum CoreMachined from solid aluminum, the rubber core section boasts an impressive 10mm diameter. This extra-thick design provides exceptional strength, allowing it to withstand the heavy tension generated when using thick-gauge PE lines with ease.b. Ring-Type Line HolderFeatures a line holder that employs multiple rubber rings. By simply wrapping the line firmly around, the rubber rings securely pinch the line, enabling quick and reliable line fixation with minimal effort.c. High-Strength Double Silicone RubberThe receiving section, which bears the greatest load when tightening the line, incorporates large, long, high-hardness silicone rubbers in a double configuration. This dual-rubber structure prevents slippage when attaching PE lines, keeps the line centered for better handling, and allows for a firmer grip achieving a light and responsive usability unlike any previous end knotter.About Studio Ocean Mark-In 2002, Takashi Otsuka established Studio Ocean Mark after leaving the fishing department for Ryobi. Otsuka chose to locate his factory in the Ota Ward of Tokyo City for its community of high-quality engineers and renowned metal shops. Studio Ocean Mark designs and manufactures fishing reels and tackle with passion, precision, and innovation in order to meet the needs of serious anglers worldwide.