we can supply you the steel tooth and tungsten carbide tricone bits from 3-7/ 8` ` to 26` ` covers all IADC code. more details please visit our website: www.goldendrillgroup.com
We Hunan Golden Drill Group, Co, Ltd is one professional maunfactorying of rock drilling tools and casting, Our main products include tricone bit, down the hole bits, button bits, ....