SAM Rol-A-Blade Snow Plow Caster Set comes with 3 dollies to easily move and store your snow plow. Each dolly has a heavy-duty powder-coated base, and molded poly surface to prevent corrosion and damage to your cutting edge. The dollies each have 3 standard casters and one locking caster to prevent unintended rolling. Capacity is 350 lb per dolly.