Scotts Pro Edgeguard Broadcast Spreader is created with EdgeGuard Technology exclusive from Scotts only. EdgeGuard functions by blocking off the spreader's right side in order to prevent the product from spreading on hard surfaces or non-lawn areas. This product has a control panel with great precision rate settings for accurate distribution and coverage. This product is delivered ready-to-use, already assembled and pre-calibrated. It also comes with air-filled tires for better traction and smoother ride. This can hold up to 18,000 square feet of Scotts lawn products.