Description The Grass Gator Weed II is a quality heavy-duty replacement string trimmer cutting head with serrated-edge gator blades. It replaces bump and feed gas trimmer heads. It is designed to be used for heavy weeds and tall grass, and is recommended for straight shaft units only. The replacement head's patented pin retaining cap allows you to change blades in seconds without using any tools. In addition to being quick and simple to install, it is stronger and lighter than old-fashioned nut and bolt design replacement heads. The package includes three extra blades free of charge, so keeping your trimmer in top operating condition is easy and convenient. The Grass Gator replacement head is safer than chain-type heads--in fact, they are the most user-friendly replacement heads on the market.