The Holesaw Arbor will fit all DART holesaws as well as most other holesaws. A unique thread on this arbor allows two holesaws to be mounted inside each other, so holes can be easily enlarged. Our standard 83mm pilot drill is included, which can also be interchanged with other holesaw pilot drills from our range. Suitable for holesaws from 32mm to 210mm, this arbor has a standard SDS+ shank.