The Steel Backing Plates (Metal Upper Thin Plate) is a versatile and reliable product suitable for Aluminum master lap and plastic master lap. It's specifically designed for diamond laps used on master laps without metal. Featuring a self-adhesive backing, it easily adheres to aluminum or plastic master lap. One of its primary benefits is its non-diamond composition, allowing seamless use with our  magnetic backed  diamond disks. This feature is ideal for frequent diamond disks use, ensuring effortless and efficient disk utilization.