... code 4.best price 5.delivery on t 1,Types: pdc drill bit which are used for mining pilling, water well drilling or ... ,very hard formation .We have different and suitable types12,Button bit: small tooth, big tooth,conical inserts,chisel inserts13,Packing: in ... ,but still depending on the quantity of the order16,Advantage: high quality on time delivery and large available quantitcontact:Amily Sutel:+0086 ...