Hot Max 26271-25 4" x 1/16" x 5/8" 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 15,200 Designed primarily for masonry, concrete, and asphalt work 4" diameter, 1/16" thickness, 5/8" arbor