The Norton C24-R floor rubbing stone is crafted from silicon carbide (Crystolon) with a smooth face, designed for smoothing concrete and eliminating mold imprints, fitting most concrete floor grinding equipment. Silicon carbide (Crystolon) features a sharp, aggressive grain offering exceptional penetration, quick cutting, and significant material removal even with minimal force. The C24-R's extra-coarse grit size facilitates quicker cutting compared to finer grit abrasives, and reusable wooden wedges securely hold the stone to equipment chucks. The stone measures 2 x 2 x 4 inches (height x width x depth), where height is the vertical span from base to top, width is the horizontal stretch from left to right, and depth is the horizontal distance from front to back. Rubbing stones, also known as abrasive blocks, are rectangular abrasive materials used for cleaning and smoothing hard surfaces like concrete, stone, and other cutting tools. They can be composed of silicon carbide (Crystolon), aluminum oxide (India), or other abrasives, with surfaces that may be smooth or grooved. These stones serve various purposes, from handheld versions with handles to those compatible with concrete floor grinders. Norton Abrasives, since its founding in the USA in 1885, specializes in abrasives for sanding, grinding, and polishing, conforming to ISO 9000 and 14001 standards for quality and environmental management.