This speciality tool is for installing a Timken-style bearing race that features an integrated fork stop, such as the SKU 015220 Pro One Internal Fork Stop Kit. Made out of 1/4" thick, raw mild steel, the relief in this heavy-duty washer paired with the exact right diameter allows the bearing race to be installed in the lower neck cup with a neck cup installation tool, such as the Fast Eddy No.11 Motorcycle Neck Bearing Cup Installer. The proper tools make the job quick and easy, and allow you to properly align the fork stop tab just where you want it. Made in the USA.