These are your standard Segmented Diamond Blades by Pearl Abrasive Co. These blades come in General Purpose, Concrete/Masonry, Asphalt/Green Concrete, & Hard Materials. Panther also carries Professional Wet Cutting Concrete or Asphalt segmented blades, these blades range in diameters from 14" to 36" and come in Medium or Soft Bond. Please call Trans American Products to get item Specifics on our Contractor Grade Large Diameter Diamond Blades.