[Auto Feed System Replacement]: The trimmer replacement spool is compatible with Black+Decker string trimmer and utilizes centrifugal force to feed the trimmer line as it is needed. The auto feed system replacement spool eases the tedious work of hand-winding spools
[High Quality]: Premium weed eater string with 30ft/ 0.065" diameter easily cuts through grass and weeds.
[Note]: Only Suitable for tender weed grass. Tough and strong weeds please use blades to trim
[Package Included]: 8x replacement weed wacker string BLACK+DCKER trimmer; 1x replacement cap and 1x replacement spool spring