Yard Force 21" 125cc Briggs & Stratton 450E Engine Side Chute Mower. This durable mower features Prime'N Pull technology for effortless starting and 11-inch rear wheels and 7-inch front wheels for smooth maneuvering on any lawn. The grass comb ensures a neat, even cut, while the five wheel height positions offer versatility for different grass lengths. Its 20-inch dual-action blade delivers long-lasting sharpness for years of reliable use.