Standard: ISO9001:2008 QUALITY MANAGEMENT SYSTEM CERTIFICATE Number: 0012Q212078R3M/3600 Issue Date: 2012-11-20 Expiry Date: 2015-11-20 Scope/Range: Rock Drilling Tools, Button Bits, DTH Bits, Diamond Drilling Bits, Drill Rods, Cone Rock Bits Issued By: CHINA QUALITY CERTIFICATION CENTRE

Standard: CERTIFICATE OF CHINA PPCE FAMOUS BRAND Number: PP201203RM Issue Date: 2008-12-01 Expiry Date: 2016-12-31 Scope/Range: Rock Bits, Drill Rods, DTH Hammer Bits, TCI Bits Issued By: China Petroleum Industry Association

Standard: API CERTIFICATE Number: 7-1-0170 Issue Date: 2014-12-23 Expiry Date: 2017-06-18 Scope/Range: Rock Bits,Drill Bits,TCI Bits,PDC Bits,Roller Bits,Drill Pipes,Drill Rods Issued By: American Petroleum Institute

Standard: SGS Number: 256Q9592078R3M/3600 Issue Date: 2015-08-05 Expiry Date: 2025-08-04 Scope/Range: Rock Drilling Tools, Button Bits, DTH Bits, DTH Hammers, Diamond Drilling Bits, Drill Rods, Cone Rock Bits Issued By: SGS