Oregon Gator SpeedLoad #24-500 5" PRO Easy Replacement String Trimmer Head & Line System for Gas Trimmers. Fits Stihl, Husqvarna, Echo & More Fast & easy. The Oregon Gator SpeedLoad Cutting System is a new trimmer line cutting system that offers an integrated head and disk-like system that simplifies the replacement of trimmer line. Since it is pre-coiled, no winding, spooling, or cutting of line is required. This dramatically reduces the loading and unloading time from a few minutes to about 20 seconds. Saves time. The Large Pro Head is ideal for professional jobs, intended to get you back on the job fast! Trimmer line can be loaded in 20 seconds or less. Simply drop the trimmer line disk into the Gator SpeedLoad trimmer head and youre back to work. NO extra tools required. Replaces over 95% of gas trimmer heads on the market; see fit guide for details. Not intended for electric trimmers. Fits most straight-shaft Echo, Stihl, Husqvarna, Shindaiwa, Efco, and other trimmers. Refer to Application Guide pdf or product images for compatibility, or contact Oregon directly. Frustration-free. Patented disk load system eliminates frustration of loading line into trimmer heads. Designed without removeable parts. No more loose nuts or springs in your yard! Compact replacement disks can be carried in your pocket easily. Line disk included. Use with Oregon large diameter disks.