Arbortech Plunge Blades for AS170/AS175 (Cutting Depth 4 3/4"). This blade excels at creating high-precision square holes and is suitable for various materials, including mortar, soft to medium-hard brick, aerated concrete block, limestone, fiberboard, weatherboard, and composites. With a maximum cutting depth of 4-3/4 inches, its re-sharpenable tungsten carbide teeth ensure long-lasting performance and durability.