There's a new way to reload trimmer line. The Gator Speedload cutting system is the fastest and easiest trimmer head on the market. With Gator SpeedLoad, trimmer line can be loaded in 20 seconds or less, no tools required, no winding required. The key feature of Gator SpeedLoad is the replacement line disk. The line is a tongue and groove design that is wound upon itself into a compact, easy to install disk. The disks can easily be carried in pockets for easy access. The unique tongue and groove design has sharp cutting edges for fast cutting in heavy conditions. Easy to reload To replace disks, simply depress the two buttons on the side of the head to open. Once open, drop the disk into place and snap back together. It's that easy. Easy to install and use The system is fully self-contained with no parts to lose. Fast loading increases productivity. Easy loading eliminates frustration. Rolling eyelets allow for smooth line advance, reduced line breakage and improved head durability. Easy to install on trimmers listed. Full instructions are included for step by step installation and easy to follow videos are also available.