Description This entry-level trimmer feels like first class. The STIHL FS 40 C-E trimmer is lightweight, balanced in hand and features a curved shaft for exceptional handling. And thatâs just the outside of the trimmer. Inside, the low exhaust emission and fuel-efficient engine is ideal for home use â putting grass and weeds to rest with good cutting power. This grass trimmer also features our innovative Easy2Start⢠technology, so you can get started with just a simple pull of the starter cord. Together it makes for one fantastic deal, unless youâre a weed.