Luckyway 3-Piece Hole Saw Mandrel,Fit 3/4-Inch to 6-Inch Diameter,Including 7/16-Inch and 3/8 Inch Shank Hole Saw Arbor and 3-Piece 1/4 Inch HSS(M2) Central Drills

I used this product for installing sprinkler systems easy to use great product...

I like them very well

Perfect for cutting through metal frames at work.im an comercial electrician and am constantly useing these wholesaws...

Good set

I bought these so I would have a mandrel with locking pins for my hole saw. They are very durable and very easy to use. Extremely happy with my purchase, and a great addition to my tool collection.

Fits all my brands of hole saws. Prongs really help secure the hole saw. Easy to use and so far very sturdy.

Great mechanism for release and tightening.

I should have known... more China junk!!

Great valve and good quality