Stone Construction Equipment adds the WBR650 walk-behind roller with 25.5-inch drums and a 10 horsepower Lombardini diesel engine to its lineup. The vibratory system delivers compaction force of 2,925 pounds, and the hydrostatic transmission with twin-drum drive will make a maximum travel speed of 2.5 miles per hour. The roller has a 10-inch curb clearance and can work to within an inch of obstructions on each side.