Hard wearing against obsacles (stones, fences) Highly resistant to notching and fraying Superior resistance to wear at the eyelet Greater durability than traditional lines Aerodynamic design for less effort during cutting Reduced decibel emission Very stable All types of users All types of vegetation A strong and durable line like the X1 type but for a wider range of consumer products (smaller diameters). Best performance and durability when cutting on concrete edges and metal fences.