If you want the best trimming line for a perfect lawn, you need Echos Black Diamond. With this package, youll receive 253 feet of .095 inch premium trimming line. Its spiral design will hold up to the daily rigors of landscaping work. On top of that, it has razor sharp edges carved into its square shape. On top of being able to tear through plant matter with ease, this shape keeps the line balanced. That means the line will not wobble while youre working at high velocities. This also means that the string will not lose speed, and it will keep an even cut as you work through your lawn. Its a universal line, so its likely to fit into your gas or electric, corded or cordless string trimmer, as long as its rated to hold .095 inch string. You will also notice that the material that makes up this line is treated to resist heat. Working for extended periods of time will wear on this line less than other, rounded styles of inferior build. Working professionally or as a DIY landscaper, youll find that there is nothing better than the Black Diamond trimming line.