EGO Power+ ST1521S 15-Inch String Trimmer with POWERLOAD and Carbon Fiber Split Shaft 2.5Ah Battery and Charger IncludedThe world's first String Trimmer with POWERLOAD Technology. This patent pending technology solves for one of the biggest pain points of string trimmers, POWERLOAD technology automatically winds your trimmer. Replacing your string line is as easy as feeding the line into the head and pressing a button! The EGO POWER+ 15" POWERLOAD String Trimmer has a Carbon Fiber shaft that is stronger than any other string trimmer shaft on the market today. The shaft is equipped with a lifetime warranty so the strength and durability is guaranteed to last forever! This revolutionary trimmer is also built with a hi-efficiency brushless motor, bump feed line advance, .095" professional cutting line, and is compatible with all EGO ARC Lithium batteries to maximize the convenience of cordless and deliver Power Beyond Belief.EGO Power+ AP1500 String Trimmer Strap for for EGO 15-Inch String Trimmer ST1501-S/ST1500-SThe trimmer strap is designed specifically for use with EGO power+ 56V 15" Cordless string trimmers, AP1500 numbers ST1500, ST1501, st1501-s, ST1502 & st1502-s. Experience increased comfort during extended use or use with larger & heavier batteries with this thoughtfully designed strap.