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The Sia 1950 SiaSpeed Multihole Discs 150mm P40 are high-performance abrasive discs designed for aggressive stock removal and fast sanding in automotive refinishing and industrial applications. Engineered with a premium aluminum oxide grain and a multihole pattern, these discs provide excellent dust extraction for a cleaner work environment and extended tool life. Ideal for coarse sanding of fillers, composites, and metals, they deliver consistent results on demanding surfaces.