Dual frequencies (1800 and 2160 vpm) and amplitudes (61,825 lbs. of centrifugal force in high; 44,550 lbs. in low) make it possible to use a single machine to prepare sites for highway construction and maintenance, airports, streets and subdivisions, parking lots, and landfills. Powered by a 160-hp Cummins diesel engine, the BW213DH-40 smooth-drum roller compacts granular and mixed soils; the BW213PDH-40 padfoot roller is for cohesive and semi-cohesive soils. Hoods open vertically for easy access to engine and hydraulic components. Bomag Americas Inc. 800-782-6624. www.gobomag.com/single-drum-rollers