Echo SRM-410X Straight Shaft TrimmerThe most powerful model from the brand synonymous with professional grade power. The ECHO SRM 410X straight shaft string trimmer levels tough, overgrown weeds and grass with power to spare. And with an impressive power to weight ratio, its a nimble beast. Features: Solid steel drive shaft for smooth acceleration and lightweight Pleated paper air filter for use in harsh conditions Heavy duty 42. 7 cc professional grade, 2 stroke engine