Dynabrade 54326 5-Inch Diameter Hook-Face Short Nap 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 Short nap pad for use with reattachable discs Industrial-rated for tough production performance