The Duoxim Arbor is an innovative system for enlarging existing holes. Perfect for expanding holes for downlights in ceilings, the tool couldn't be easier to use. Simply replace your smaller size hole saw with the desired larger size via the arbor screw thread, then add the original hole saw over the top. Using your first saw as a guide, drill over your original hole to enlarge.
Suitable for use with holesaws 32mm and above.