Product Description SIZE : 8 -1/2 inch Diamter : 215.9 mm Primiary Cutter Size: 16mm Second main cutter size : 13mm Blades : 6 Blades with double cutter row Gauge protection :Yes Nozzles Size : 16 Nozzels No :7 Optional Feature : Back reaming Double cutter row Appliaction : Drilling Industrial , oil drilling ,minng drilling ,water drilling , Product Parameters Weight On Bit (klbs): 5-30 Rotation Speed (Rotary): 60-DHM Flow Rate (GPM): 400 - 500 Make Up Toqure(klb.ft): 17.0 - 26.4 manufacture process Certifications Test Report Company exhibition Packaging & Shipping FAQ F.A.Q Q: Are your company a trading company or manufacturing factory : A: We are professional manufacture with over +20 experience Q: Accepted Payment Terms: A: T/T, L/C, Paypal, Western Union, etc. Q: Guarantee and Warranty of Quality: A: We are an API&ISO certified factory, we have one integrated set of systems to control quality in production and make after-sale service. Q: Referenced Letters: A: We have many Referenced Letters issued by our customers from many countries for checking our quality and service. Q: Can I visit your factory online? A: Yes, we can show our workshop, warehouse, offices online by WeChat, Whatsapp, or Skype