With professional and productive factory, HAINAISEN is one of the leading China steel matrix pdc drill bit manufacturers. Welcome to wholesale steel matrix pdc drill bit from us, we always have cheap products to offer you. 1.Specification: 2.Bit Size: 4 1/2"-- 17 1/2''(114mm--444.5mm) Blades: 3--9 Blades Nozzles: according to your requirement PDC Cutter: 1913,1613,1313 and so on Rotary speed:60-300 rpm Delivery terms:within 3 days after the payment Package: Wooden Boxes. as custoemrs requirements OEM: OK, We can make kinds of PDC bits according to customers' requirements http://www.pdcoiltool.com