1.8 5/8'' 219.1mm SKH437 TCI tricone rock bit 2 ... 4.high quality, low price Advantage of our products:1.stocks adequate, time delivery2.rich experience in drill ... abrasion and impact resistance. Detailed Product Description:Bit size8 5/8'' 219.1mmIADCSKH116,SKH126,SKH136,SKH216,SKH137,SKH217,SKH437,SKH517 ... ,SKH537,Pin shank size4 1/2WOB (KN/mm bit diameter)0.35--0. ...