The MK-303 Professional 24" diamond saw blade is a continuous rim blade for lapidary materials which produces smoother cuts and is used for cutting rare and valuable materials when waste must be kept to a minimum and speed of cut is essential. Retail price listed of $740.00 will receive a discount of 20% at the SHOPPING CART. The Professional series diamond blades last longer and will cut faster than ordinary notched-rim or plated-diamond blades.  (Diameter of blade 24" or 508mm; rim width is .100; arbor size is 1"; part #156731). Made in the U.S.A. by manufacturers, MK Diamond Products, Torrance, CA