Flexible Backer Pads The Alpha Flexible Backer Pads were developed as a part of the wet polishing system that Alpha introduced to the North American markets. This wet polishing system quickly became the accepted method of polishing. The Alpha Flexible Backer Pad proved to be very durable and soon became the backer pad of choice among fabricators, tile contractors, monumentalists, and restoration workers. The Alpha Flexible Backer Pads are hook and loop-backed and will accept Ceramica, Sandpaper, and Felt Wheels. All users of polishing equipment will love the quality and long life of these backer pads. Extremely flexible, these backer pads are ideally suited for tough contours and inside curves, allowing the user to get into tight corners with ease. Available in 2, 3, 4, and 5  versions, these pads come with the standard 5/8 -11 thread, commonly seen on most of the polishing tools in use today. Some metric sizes are available on request. Whether you are a fabricator, tile installer, monumentalist, or restoration worker, Alpha Flexible Backer Pads are for you. Highly resistant to the rigors of daily use, these flexible backer pads are the best on the market. 5/8″-11 Thread