The "Pilot Bearing Pulling Attachment" allows you to remove pilot bearings, thrust washers and smaller bearings hidden in a shaft or housing. It works with both 5/8 ‐ 18 as well as M18 - 1.5 threaded hammer shanks. The jaws require a minimum of 5/8 inch opening and can range up to a maximum of 1‐1/2 inch diameter. This spread is actuated by simply turning the head of the attachment.