Grinding element for use in rotary grinding or polishing tools

A grinding element for use in rotary grinding or polishing tools used for grinding or polishing surfaces and of a type comprising an elongate profile rail and an abrasive cloth and support brushes, and wherein the abrasive cloth and the support brushes are mounted in or on the profile rail, such that the abrasive cloth on its inactive side is supported by the support brushes, wherein the abrasive cloth outside the profile rail has a height of the abrasive cloth in the vertical direction and a cloth length in the longitudinal direction, wherein the support brushes and the abrasive cloth have different heights, a support brush height and an abrasive cloth height, respectively, from the profile rail, such that the abrasive cloth is terminated by an outer exposed edge area extending beyond the top of the support brushes as the height of the cloth exceeds the height of the support brushes and a short distance down along the outer exposed end portions of the support brushes, which outer exposed edge area, when in use, forms an active area of an active side of the abrasive cloth, wherein the abrasive material is applied only to the active area of the abrasive cloth, which abrasive material includes particles, which abrasive cloth is cut from an outer exposed edge of the cloth against the profile rail in a direction parallel to the vertical direction in order to form slats, and which particles are arranged in adjacent rows, wherein the particles of the abrasive material in a row are arranged with the particles offset relative to the particles in adjacent rows, and wherein the particles in the adjacent rows are spaced apart, such that the abrasive particles overlap in the longitudinal direction of the abrasive cloth.