IVY Classic 39093 Drill Arbor Adapter, Adapts 1/2-Inch Arbor Hole to 1/4-Inch Shank, 1/Card

Works just fine.

Not much to say here. It's a generic arbor for using cheap shaft mount tools (such as wire wheels) with a die grinder or drill. I got this to use 3" for my angle die grinder and it works quite fine.For the sake of fun facts, the thread is 1/2-13 LH and the nut is some kind of hardened steel with O.D. of 3/4.

Good quality, but expensive for what it is. Can find basically the same thing at local hardware stores for less than half the price. Look for Ryobi at HD, for example. Went to buy one there, but this got left in my Amazon cart and I checked out on my phone, not realizing it was still there. No sense sending it back. I paid 9 for this, HD has them for under 4.

The runout on the 1/4 shaft is acceptable at +/- 0.005 (thousands of an inch). At the end of the assembly where a blade or other tool is to be placed, the runout was between 0.005 and 0.015. You can actually see that it is warped. It is totally unacceptable for a circular saw blade that needs very little runout. It would be suitable, for some other tool, if you could stand the vibration.

Mine snapped and broke but it was my fault. I used a 12 inch cement blade that worked very well for a couple of months of every day use' In other words its great Arbor

Because the washers are not dished the clamping pressure is near the centre making it more likely that clamping a grinding wheel might make it crack. Plain washers are ok for mounting buffing pads or wire brush wheels. It's a pity that a very large screwdriver is needed to tighten the wheel in place, a hexagonal head that could be tightened with a spanner would be better. The packaging claims that the arbor can clamp a wheel that is up to 1 inch thick. Not so. The arbor only has the capacity to clamp wheels up to 0.6 inch thick, 0.7 inch if you leave out the washers. It has a maximum speed of 6,000 rpm. It's made in China.