The toro 21766 is a 4 wheel rotary machine added to the toro homeowner range of recycler lawn mowers with steel cutting decks.toro petrol recycler mowers enable the user to recycle on demand as they mow. This means you can switch from collecting the grass to mulching it in seconds with a flip of a single lever. No need to remove the grass collector. Mulching the grass into fine pieces places them back into the ground helping with new grass root growth and improved overall appearance.the toro 21766 recycler features all wheel drive which gives continuous drive to all four wheels for better traction on slopes or whilst mowing in damp or wet conditions. Rear wheel and front wheel drive lawn mowers can slip down inclines but awd machines will keep a straight mowing line. All wheel drive also helps with moving the mower around turns or obstacles on the lawn including beds and shrubs.the toro automatic drive system with traction assist propels the mower along at a comfortable pace in step with your own. The drive system continually adapts to your speed, slower or quicker even up or down slopes. The 21766 replaces the 20960.specificationsengine briggs and stratton 675exi ohv readystartengine capacity 163ccstarter recoildrive automatic drive systemcutting width 55cmcutting height adjustment 4 point, 25mm 102mmrear collect yesmulch recycle yesside discharge yesgrass bag capacity 74 litresweight 58kgdimensions hxlxw 1003mm x 1499mm x 602mmwash port yeswarranty manufacturer's 2 year