The XD 509 Tezz is an aluminium oxide flap disc on X-weight polycotton with semi-open coat, designed for weld removal and surface blending on steel and stainless steel in light to medium duty applications. The Tezz specification is the practical choice for fabrication shops running high disc volumes on standard MS and SS work — reliable performance, consistent finish, and the economy that general-purpose weld blending warrants.