Description of Hole Saw Arbor: 2 20 Thread - Efficient Cutting Tool for Precision Drilling
Manufacturer: Milwaukee. Country of manufacture: China. Power Cutting & Sawing. 3/8 in. hex shank 1/2 in. - 20 thread. Standard pilot 49-56-8010. For Hole Saws 9/16 in. to 1-3/16 in. diameter.
Milwaukee hole saws have at least 2 different mandrel sizes. I was a bigger size and had to buy it for size 15/16. I don't know at what size the large arbor comes into play.
Well made and finished Milwaukee mandrel. Fits standard 1/2" threads in smaller hole saws. The mandrel body is painted black, not uncoated as shown. Recommended.
This mandrel has a one-piece shank with flats. Result: no slippage in the chuck. My first mandrel used the end of a pilot nozzle to secure it in the chuck - it kept slipping and just broke off at the end. This is the best gazebo.