"This 15 in. String Trimmer with POWERLOAD technology automatically winds your trimmer line. Replacing your string line is as easy as feeding the line into the head and pressing a button! With the telescopic aluminum shaft, easily adjust the shaft length for ease of use and comfort. This trimmer is built with a high-efficiency brushless motor, bump feed line advance, 0.095" professional cutting line, and is compatible with all EGO ARC Lithium batteries to maximize the convenience of cordless and deliver Power Beyond Belief".