UNMATCHED DURABILITY - Constructed with top-grade zirconia abrasive grain in an industrial-grade, high-density build for a robust, cost-effective grinding experience. EXTRA-THICK & HIGH-DENSITY - Extra-thick flaps and high-density construction (packed with ~90 flap pages) deliver longer disc life, cooler grinding, and fewer changeouts — about 40% more abrasive material than standard flap discs. 20 PACK VALUE - Premium high-density flap discs for contractors, welders, and DIYers tackling grinding, sanding, and finishing. VERSATILE - Ideal for steel, stainless steel, cast iron, aluminum, and wood. Perfect for weld grinding, edge blending, rust removal, and surface prep. Frequently asked questionsQ: What is a flap disc used for?A: It grinds and finishes in one step — weld blending, deburring, rust and paint removal, and surface finishing on metal and wood.Q: What is the difference between Type 27 and Type 29 flap discs?A: Type 27 is flat for surface and edge work on flat areas; Type 29 is conical for more aggressive stock removal and better contact on edges and contours.Q: What grinder do these fit?A: Standard angle grinders matching the arbor size listed in the title and specifications.Q: Which grit should I choose?A: Use a coarse grit (36–40) for heavy stock removal, medium (60–80) for general grinding, and fine (120+) for blending and finishing.Why choose Whitby AbrasivesWhitby Abrasives Inc. is a Canadian supplier of professional grinding, cutting, sanding, and finishing abrasives. We focus on consistent quality, fair pricing, and fast shipping across Canada so fabricators, welders, woodworkers, contractors, and DIYers get abrasives that perform job after job. Have a question about sizing or the right grit for your project? Our team is happy to help.
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