fiskars staysharp max 18" reel lawn mower worx 20" 3n1 push mower work staysharp cutting system reduces wear inertiadrive reel provides cutting power fully collapsible handle and compact stand up storage charger included warranty yard machines 20" push mower 132cc powermore ohv engine 21" 2n1 push mower 140cc ohv powermore engine height adjustment 21" 2n1 fwd mower 140cc ohv powermore engine dual lever 6 position height adjustment