BLACK+DECKER MTD100 3-in-1 Removable Mower Deck 3 tools in 1- easily converts 12" trimmer/edger to mower Adjustable 2 height adjustment deck for ideal cutting height Compatible with NST2118, LST220, LST300, LST400, LST420, GH912 to convert from trimmer/edger to mower Wall hanging option to make storage much easier