Mercury Series concrete-pavement saws range in horsepower from 30 to 65. The Q-3030 and Q-3035 ride on maintenance-free, dual-sealed, 10-inch rear wheels, and the Q-6065 and Q-6057/Q-6457 have 12-inch rear wheels. The generators feature dual five-groove team belts for increased load capacity. The Q-6457 offers a four-speed gearbox and accommodates blades from 14 to 48 inches with no pulley or belt changes. All saws come standard with a 20-inch blade guard. Optional blade-guard sizes range from 16 to 48 inches.