The SPT79A-10 MEDUSAW walk-behind concrete saw features the same wet- and dry-cutting capabilities of earlier MEDUSAW models. The 7-in. saw features a worm-drive motor with overload protection to prevent the operator from driving the saw forward too quickly. The saw’s housing is made of die-cast aluminum with zinc-plated brackets, reducing corrosion. Skiksaw; www.skilsaw.com