Delivering 5x the power of handheld trimmers, an ECHO wheeled trimmer is a tough tool for tough jobs. Along retaining walls, fences, raised flowerbeds and trees, they excel in the dense weeds and grass lawnmowers can’t reach. Compare Specs WT-1610 WT-1610T WT-1610SP Specs Model Engine Weight (lbs) Fuel Capacity (fl. oz.) Trimmer Type Cutting Swath (in.) Standard Line Diameter (in.) WT-1610 163cc Briggs & Stratton OHV 78 25 Push 24 .155 WT-1610T 160cc Briggs & Stratton OHV 84 25 Push 24 .155 WT-1610SP 163cc Briggs & Stratton OHV 97 25 3-Speed Self-Propelled 24 .155