4 1/2" X 1/2-13 メスネジアーバー、不織布用ロングフックバックアップパッド USA

The hook design on this arbor really locks the pad on tight, which is a relief compared to other systems I've used. It threads onto my grinder smoothly and runs true without wobble. Perfect for getting into tight spots with non-woven wheels.

Finally got around to mounting this and the 1/2-13 threads spun on smooth as butter. The long hook holds the non-woven pad much more securely than the short-hook backup I was using before.

Finally found an arbor that actually holds my non-woven discs snugly thanks to that long hook design—no more wobble during use. The 1/2-13 female thread threaded right onto my grinder without any adapters needed.