Similar to the other miniature flap discs, Joysun arbor dish flexi mini flap discs are constructed in semi-vertical form with a flexible material that is bonded to the fiberglass backing plate. They are compatible with straight and angle grinders. The small diameter and flexibility of the discs allows them to be used in hard to reach grinding applications. They can perform weld seam grinding in tight corners or in contoured ridges and valleys of certain materials with ease. The arbor dish flexi mini flap discs are perfectly suited for processing carbon steel, stainless steel, titanium and many other types of metals including certain alloys.