This is a TB6044 XP gas string trimmer with SpringAssist.  It is easy to start and easy to use. This straight shaft 4-cycle trimmer has an over-molded grip and multi-position overmold handle. It is designed with the EZ-Link® attachment system to accept all TrimmerPlus string trimmer attachments.  With its ease-of-use, versatility and 3-year limited warranty, this Troy-Bilt 4-cycle gas string trimmer will meet all your trimming needs.