Drill Hog 孔鋸心軸 孔鋸柄轉接夾頭 適用1-1/4至6吋孔鋸

The threaded arbor fit my 4-inch hole saws perfectly, and the M7 pilot bit stayed centered through pine without wandering. Only used it a few times so far, but the chuck holds tight with no wobble at all.

Grabbed this for a deck build and it threaded right onto my 2-1/8" saw without any slop. The 5" overall length gives plenty of reach through doubled-up lumber, and the arbor didn't wobble once.

The M7 pilot bit drilled a clean center hole in my door slab without wandering, which is exactly what I needed for a 2-1/8" lockset. The 1/4" hex shank chucked up fine in my corded drill and the arbor handled a 4" saw without wobbling. Solid adapter for the price.