The EGO POWER+ Multi-Tool 43cm POWERLOAD™ Line Trimmer with Line IQ™ features push-button line loading and auto feeding technologies. LINE IQ™ auto feeds the trimmer line for no-bump, high-performance trimming with a continuous 43cm cutting swath. With POWERLOAD™ technology, replacing your line is as easy as feeding the line, pressing a button to wind, and getting back to work in seconds. The STA1700 attachments is designed specifically for your EGO POWER+ Power Head (PH1420E) and offer the highest quality and performance. Experience Power Beyond Belief™ without the noise, fuss, or fumes. Please note the POWERLOAD™ function will only work in combination with the Upgraded Power Head (PH1420E), this function will not work with the older Power Head (PH1400E) however the line trimming function will still continue to work.