Hole Saw Arbors

Bearcat™ Variable Pitch All-Purpose Hole Saw Arbors
Four regular models are available, each furnished with a 1/4"(6.35 mm) pilot drill. Set-screw in the body allows easy replacement of the pilot drill. Quick-Hitch™ arbors permit instant change of hole saws without tools and without removing the arbor from the chuck. The No. A4 model is supplied with flats to fit a 5/8" (16 mm) wrench. 

A1   Arbor (55141000), HSS drill, fits saw diam 9/16"-1 3/16", 3/8" chuck
A4   Arbor (55144000), HSS drill, fits saw diam 9/16"-1 3/16", 1/4" chuck
A2   Arbor (55142000), HSS drill, fits saw diam 1 1/4"-6", 1/2" chuck
A10 Arbor (56615000), HSS drill, fits saw diam 1 1/4"-6", 3/8" chuck