Recharge Tools GTB-20 Flexiblades For GTLI-10 Grass Trimmer - 20 Pack Each Flexiblade simply replaces in seconds saving time and eliminating the frustration of trimming and fussing with nylon line Outlasts standard trimmer line resulting in more trimming time and less time spent on aggravating spool or line changes No longer do you have to fight with tangled and twisted nylon trimmer lines or spools Long lasting durable plastic construction Conveniently stores on grass trimmer for ease of use when required