Lenox Tools 1779670 6L Snap Back Arbor with 3-1/4-Inch Pilot Drill Bit for Hole Saws N/A Hecho en EE. UU. o importado LENOX hole saw arbor extension is fast and easy to engage and disengage No tools are needed, helping prevent the hole saw from locking on the arbor LENOX hole saw arbor threads directly into virtually all hole saws; no adapter required Easier plug removal this item fits hole saws from 1-1/4  6 in size