Review on Milwaukee Electric Tool 49-56-7250 Quickchang Drill Bit by Brad Lovro

A major benefit of this shank is that it accepts common 3/8 works "chucks" and has a 5/8"-18 interface thread used by larger hole saws. This allows traditional 3/8" drill bits to be used with large hole saw blades in applications where cutting forces are low enough that a 3/8" drill bit can be used and a 1/2" drill bit is not required. This is important to me as I don't have a 1/2" drill bit and wanted to use one of my many 3/8" drill bits to cut holes in the ceiling for 4" recessed lights. Another nice feature of the Milwaukee Arbor is that its pin extraction mechanism toggles on and off, so you don't have to constantly hold the pins while threading the hole saw blade (unlike the Dewalt design). Once the blade is twisted, the pins can easily be snapped into the engaged position. The only issue I had was that the set screw holding the pilot drill was incredibly tight. I had to briefly heat the mechanism with a flashlight to loosen the set screw. For my application I wanted to use a longer pilot drill. The included 1/4" drill bit extends only about 2 1/4" beyond the rear base of the hole saw blade. By loosening the set screw you can move it out an additional 3/4 inch. In my case, I replaced the pilot bit with one of my Dewalt mandrels, which is also about 1/2" longer than the Milwaukee pilot bit. Works great! Guessing!