... li mestones. Size and IADC available: 3 3/4" to 26" IADC 415,435,445,417,437,517, ... 737512,522,532,612,622,632,7326. How to ship the bits to your country? You Satisfaction Is Our Purpose ... ) PLs tell the drilling information of the layer.4) PLs tell the quantity. TCI tricone bit(high ... :kingdreamModel Number:HAType:Center Drill BitGuarantee period:2~4 yearsUse:Well Drilling Rotary speed:300~80r/minTypes ...