Hot Max 26272-25 4-1/2" x 1/16" x 7/8" Masonry Cut Off Wheel (25 Pack) Wheel composition allows for a durable and long lasting wheel when used with masonry The grain composition allows for a smooth cut Maximum RPM of 13,300 Designed primarily for masonry, concrete, and asphalt work 4-1/2" diameter, 1/16" thickness, 7/8" arbor