“OOPS” Arbor accepts two-threaded cutters. [Size difference must be at least 4.8 mm (3/16”).] Will accept 51 mm (2”) inner and 63 mm (2.5”) outer for redrilling an existing
51 mm (2”) hole to a 63 mm (2.5”) hole. This will ease the installation of larger transducer into smaller previously drilled holes.

Remove the drill bit from original arbor. The “OOPS” Arbor, with secondary hole saw, inserts into drill bit hole.

Available Hole Saws:

HS-0007 (7/8”)
HS-1002 (1-1/4”)
HS-1003 (1-3/8”)
HS-2000 (2”)
HS-2004 (2-1/2”)
HS-2005 (2-7/8”)
HS-3006 (3-3/4”)