These spools can be used in the following Worx trimmer/edger models:WG150, WG151, WG151.5, WG152, WG153, WG154, WG155, WG155.5,WG156,WG157,WG160,WG160.1,WG160.2,WG160.3,WG160.4,WG162,WG163,WG165,WG166,WG166.1,WG167,WG174,WG175, WG175.1,WG176,WG180. High Quality 10 ft./ 0.065 in. Edger Spool Line and Cap: 6 pack of 10ft each twisted nylon resin and synthetic trimmer/edger line, 1Pack Trimmer Cap,Pliable and flexible allowing for the line to stretch and cushion on impact with hard surfaces,Spools models WA0010 and cap covers models WA6531 GT. Aerodynamic shape allows less drag for more efficient cuts.Worx WA0010 Spool AKA Worx WG180,WG163 Line,WG163 Trimmer Line,WG163 Parts,WG163 String,Worx WG163 Replacement Spools,WG180 Spool Cap,WG180 Worx Spool,WG155 Worx Spool Cap,Worx WG155 String,WG154 Worx String,WG154 Worx,WG180 Worx,WG163 Worx,WG155 Worx,Worx WG163,Worx WG154,WG160 Worx Cap,Worx WG154 String,Worx Replacement Spool WA0010,WG180 Worx Spool. The trimmer replacement spool is compatible with Worx 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 100% satisfactory service, if you have any questions, please feel free to contact us by email We will solve it for you in the first time