The Swag Super Shaft easily allows you to switch from one hole saw to the next with the use of threaded. You no longer need to jam screw drivers in the port holes to remove your hole saws and or use thread reducers in your hole saws to get the correct thread diameter. You will no longer be breaking screwdrivers, ob-longing your hole. Saws, and or breaking and welding the thread reducers on your hole saws, do the math and save your self the aggravation. For the "Super Shaft" we now offer them.We have found that it works best to permanently leave the arbor inserts in your hole saws. To remove the arbors from the shaft you simply loosening the 3 sets screws, this cuts down on having to thread/unthread the hole saw and potentially galling up the threads on your hole saws. SWAG Super Shaft Arbor Inserts. We save you the trouble of hunting down the correct size shaft arbors that are compatible with our Swag Super Shaft's. The 3/8 hole saw arbors are manufactured by Milwaukee and are available in two different sizes. Small Arbors fit hole saws ranging from 9/16" to 1 3/8" diameter Milwaukee PN# 49-56-7010. Large arbors fit hole saws ranging from 1 1/4" to 6 7/8" diameter Milwaukee PN # 49-56-7040. The item "SWAG Off Road Tube Notcher Replacement Super Shafts" is in sale since Friday, April 29, 2016. This item is in the category "eBay Motors\Automotive Tools & Supplies\Shop Equipment & Supplies\Shop Supplies\Other Shop Supplies". The seller is "swagoffroad" and is located in Bend, Oregon. This item can be shipped to United States.