These premium-quality resin-bonded zirconium oxide flap discs offer enhanced cutting performance and efficiency. They have a self-sharpening feature, which increases high stock removal and durability. The strong X-weight polyester-cotton backing allows flexible and fast cutting on medium to high-pressure grinding and finishing applications. The T-29 conical shape features 1525 angled flaps, ideal for contoured and flat-edged work. Suitable for sanding, grinding, stock removal and weld preparation of metal, carbon steel, stainless steel, sheet metal, wood and plastic. Compatible with 100mm air angle grinders with a 16mm bore.