ALWAYS FREE SAME DAY SHIPPING SHIPS FROM USA EVO-Twist by Rino-Tuff is a professional grade trimmer line that is 20% more durable than our current professional grade line AND biodegrades 30x faster than a conventional trimmer line* The aerodynamic twisted shape reduces line resistance and vibration, keeping the trimmer from slowing down, using less battery energy and cutting more, yielding up to 15% longer runtime for cordless trimmers Impact modifiers are embedded within the nylon to keep your line from breaking away when trimming against obstacles as often as other products on the market  That means cutting more with fewer stops to get the job done faster *24% biodegradation within 1 year via ASTM D5511 testing method in an anaerobic landfill. Anaerobic landfills may not be available in your area Biodegrades 30x faster than a conventional trimmer line Scientifically engineered to last longer Aerodynamic for less resistance, using less battery energy to cut more Used for trimming or edging grass Universal fit