PFERD offers a variety of hole saw shanks designed for different hole saw dimensions. PFERD also offers arbor extensions for working on hard-to-reach areas. Hole saw arbors are designed for mounting the hole saw and the pilot drill. They are available in three sizes. All hole saw arbors come with an ejection spring to allow for better ejection of the sawn material. The hole saw arbor EDP 29034 comes with bi-metal pilot drill EDP 29040 and an ejection spring.