Avanti Pro, 4-1/2" x 1/16" x 7/8", Masonry, Cut-Off Disc, Bonded Masonry Cut-Off Discs Are Designed For Cutting Masonry Materials, Such As Concrete, Brick & Block, This Cut-Off Disc Is For Use With Angle Grinders, Provides The Necessary Performance & Durability To Complete Masonry Project.