The STIHL PolyCut™ is a multi- purpose cutting tool with three thermoplastic blades. Some models can also be fitted with up to .130" diameter flexible nylon line. It is ideal for lawn trimming or cutting close to walls and fences, around trees or between shrubs. The nylon line is particularly suitable for low grass. The thermoplastic blades can be used for mowing high-growing grass. See chart for a STIHL PolyCut™ that fits your trimmer.