A flap is an abrasive product designed for right angle grinding machine applications consisting of overlapping abrasive "flaps" that are radially glued to the backplate. Flaps discs became popular for benefits such as rapid demolding and the ability to perform grinding, mixing, and finishing in one product.

Many flap discs remove up to many times the material with fewer workpiece grooves than standard grinding wheels. They are also easier to control, resulting in better workpiece quality and fewer replacements. There is no need to replace grinding wheels, and the user experiences less downtime, less varnishing, loading and workpiece discoloration. In addition to their ease of use, flap discs are also the operator's first choice because they generate lower vibration and noise levels.

The meta and wood are polished and rusted by an Angle grinder equipped with Flap disc， It should be noted that water should not be added when using

The leaf is brown in color. A disc made from aluminum oxide has a hard, durable grain and a strong initial cut rate, and it offers fast stock removal and consistent performance. Aluminum oxide is ideal for workpieces made of materials such as steel, as well as for all-purpose use.

The leaf is black in color. The Calcined Aluminum Oxide Flap Disc is used for shaping, grinding and sanding metal. It provides better surface quality and produces finer grinding patterns. It is ideal for materials such as steel and stainless Steel.

The leaf is blue in color. A flap disc made from 100% zirconia alumina allows for aggressive stock removal and high-performance edge grinding. Zirconia alumina is self-sharpening, and it holds up exceptionally well under high temperatures and pressures. With proper use and maintenance, it provides a rapid cut and long lifespan.

The leaf is red in color. Ceramic is your best bet when looking for a Flap dsic with maximum performance. It works on standard steel, tool steel, armor steel, titanium, inconel, high nickel alloy, stainless steel and aluminum workpieces. It works very well on hard to grind metals.