The dust grabber replacement seal kit includes two polymer seals with one worm clamp. Just place the polymer seal over the steel dust skirt and tighten it using the worm clamp.
**Note: To insure that your new Dust Grabber shroud works correctly, adjust the seal after you have attached the diamond cup wheel. Place the Diamond wheel on the floor or flat surface and adjust the seal so that it just touches the floor. Make sure the top of the seal is below the red line on the side of the shroud.