The 15" EGO POWER+ Commercial Backpack Series String Trimmer combines a heavy duty brushless motor and carbon fiber shaft stronger than any other string trimmer shaft on the market. The shaft is equipped with a lifetime warranty so the strength and durability is guaranteed to last forever! The 15-inch cutting swath, bump-head line advancement and professional-grade 0.095 inch cutting line make quick work of yard clean ups. The high-efficiency brushless motor delivers longer run time, low vibrations, and an extended motor life. This quiet, lightweight and balanced string trimmer gets the job done faster and quieter than gas! Compatible with EGO POWER+ Commercial Backpack Series Battery (BAX1501) and Backpack Link (BHX1001). Experience Power Beyond Belief™ with the EGO POWER+ Commercial Backpack Series String Trimmer.