The Oregon 24550 Gator SpeedLoad Large Filament Trimmer Head is a universal fit accessory designed for straight shaft trimmers 25cc and above. This innovative trimmer head offers easy loading without the need for winding, utilizing durable, heat-treated Oregon SpeedLoad™ line. It is compatible with various line diameters, including 2.4mm (0.095"), 2.7mm (0.105"), 3.0mm (0.120"), and 3.3mm (0.130"). The head includes multiple arbors (6-point star, 8-point star, square) and a comprehensive set of bolts and nuts (7mm, 8mm, 10mm, 12mm, 1/4", 5/16", 3/8", 7/16", 1/2") to ensure broad compatibility.