These are a heavyweight H&L-Backed silicon carbide sanding disc that wears long. They're waterproof with latex backing and designed for wet or dry use. The H&L-backing won't separate from the pad when they get hot like the cheap imported ones do. They are top quality for sanding, and are designed for use on stone. These "C" weight closed-coat discs are made of an anti-clog, no load, resin over resin bond. They are waterproof with a latex backing. The discs can be used for shaping, sanding and even polishing marble, granite and other natural stone.
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