New! A completely field-replaceable PDC drilling system available in four wing from 3 7/8- to 6¾-inch  diameter in 1/8-inch increments and in three wing from 6¾ to 24 inches. We also have five- and six-blade standard PDC bits. Call for price and availability. Contact us at 800-282-6760 or sales@bluedemon.com. www.bluedemon.com