Starrett "OOPS" Arbor

It could happen to anyone, but it happened to you. Maybe you relied on bad information, or you are simply staring at a 2-1/8" hole where a new 2-3/8" lockset is supposed to go. In the old days, this situation separated the men from the boys.
Starrett’s "OOPS" arbor makes fixing that kind of problem child’s play. Just screw the hole saw for the existing hole onto the “OOPS” arbor (it accepts both 1/2" and 5/8" threaded cutters), screw the correct hole saw onto the pin-lock arbor, then place the “OOPS” arbor in the pilot drill hole. For the system to work, the inside and outside hole saws must have a size difference of at least 3/16". Indispensible when installing new door lock hardware, enlarging holes for new piping in an old house, or (ahem) correcting someone else’s mistakes. (Hole saw blades not included). Made in USA.