The Starrett Oops® Arbor is a must when you need to enlarge a hole size.
The arbor simply replaces the centre pilot drill bit with a hole aw that fits the existing hole size, and then a you simply fit the larger diameter hole aw to the outside, thus turning the smaller hole aw into your guide or pilot
Ideal for a range of uses the arbors are excellent when you are fitting new locks to existing household doors, as manytimes the new door lock might be a larger diameter than the existing hole.
Dsigned to suit all standard BI Metal holesaws
COPY RIGHT TOOL KING ALL RIGHTS RESERVED
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Works perfectly and solves the problem if you make a hole to small and need to enlarge it, a lot cheaper alternative to buying a reload set of holesaws because you can use your existing holesaws