Extra-long Multi-purpose Hole Saw, including the unique MXqs adapter AND also including the unique quick release MXqs arbor, with unique carbide tooth set for clean and high performance cutting. With a cutting depth of 300mm, these Hole Saws are e.g. perfect for use as roof transit saws. Carbide tipped teeth made from a specially developed construction grade carbide result in outstanding cutting performance and product durability. With the unique drilling guide pin drilling is safe and secure!