| Grade | Applications | 
  | YG4C | For inserting the electrical and compressed air drill bits, used in geological prospecting, coal mining, suitable for drilling coal, unsolidified shale, salt rock and other formations; Also for drilling medium hard sandstone, limestone and soft and hard rock interspersed formations. | 
  | YG8 | For coring crowns, electrical coal drill bits, coal cutting picks used in geological prospecting, coal mining. | 
  | YG8C | For rotary rock drill bits for medium soft and medium hard rock; and for coal cutting picks for cutting of stone containing formations. | 
  | YG11C | For tipping of bits for heavy rock drills and rotary hammer rock drills cutting hard rocks. | 
  | YG13C | For making drill cone to drill hard and medium hard rock formation in oil field; also for making rotary percussing drill bits and heavy duty drill bits. | 
  | YG15 | High intension, lower wear-resistance. Suitable for making bits used in rotary machine and heavy rotary machine to drill hard and very hard rock formation | 
  | YG15C | For making drill cone to drill all kinds of rock formation. | 
  | Suggestion: We would like to recommend suitable grade depending on your requirements. |