12" Steel Backing Plate with PSA Backing

The Steel Backing Plate (Metal Upper Thin Plate) is a high-performance, non-diamond lap backing designed to expand the flexibility and compatibility of your lapidary steel adapter setup. Crafted as a ferromagnetic steel disk, it serves as a durable and stable foundation for magnetic diamond tool support, allowing seamless integration with magnetic -backed diamond discs, resin polishing plates, and felt polishing pads.

Ideal for use with metal master lap accessories, this PSA steel plate is nickel-plated for corrosion resistance and available in multiple diameters (4", 6", 8", 10", 12"). Its 1.5mm thickness provides the perfect balance of rigidity and weight. Mount easily onto aluminum or plastic master  laps using PSA or double-sided adhesive, with options for full-face or no-hole designs to match your polishing workflow.

Whether you're a jeweler, gemstone carver, or industrial polisher, this steel disk for magnetic tools enables rapid disc changes, maximizes tool longevity, and ensures consistent results with every use.

• Lapidary Work: Pair with diamond disks for polishing gemstones or cabochons.

• Industrial Polishing: Supports resin-bonded abrasives for metal or ceramic finishing.

• Flexible Setups: Enhances master lap systems by enabling quick accessory swaps.