Sand super alloys, metals, woods and fiberglass composites with the ProSand A259PS medium grit paper sheet and enjoy an excellent cut rate and long-lasting durability. The sheet is crafted with a heat-treated abrasive affixed to a fiber-reinforced backing that maintains flexibility while ensuring excellent grain retention. An open coat, non-pigmented, water-based stearate coating prevents color transfer and produces minimal loading. An ideal product for moderate material removal and finishing, this versatile sandpaper delivers great results with a sanding block or board or when used for hand-sanding projects.