Aluminum Oxide Coated Flap Disc universal use on all materials , Type 27 & Type 29 .
Zirconia Coated Flap Disc for very high stock removal rates and heavy-duty use , Type 27 & Type 29 .
Zirconia alumina grain (Z) is the preferred abrasive material on alloyed and unalloyed steels.
Ceramic flap disc is the best choice for grinding stainless steel, titanium, Inconel, and others , Type 27 and Type 29
Flap discs with 5/8-11 Hub is sticked with metal hub on the backing, Quick and easy mounting and removal.
Semi-flexible disc is used for metal working, stone fabrication and rough grinding of concrete .