Dynabrade 56104 5-Inch Diameter Vinyl-Face 3/8-Inch Thick Urethane Medium Density 5/16-Inch-24 Male Thread Vacuum Disc Pad, Orange Exclusive single-piece hub design reduces pad vibration and ensures smooth performance Sanding Pad is perfectly weight-mated to Dynabrade tools, for achieving consistent swirl-free finishes Holes are precisely located to achieve proper alignment with abrasive discs for optimum vacuum capabilities Ideal for PSA-type disc adhesion Remove abrasive adhesive paper liner and press abrasive to vinyl-face sanding pad Quick disc removal Industrial-rated for tough production performance