... bit and flat cutter bits for excavate coal machine as the replacements of kennametal. Such as ... 6.All kinds of casing bits for shield machine and construction tools.7.Round road planing ... bit for road milling machine and trenching machine. Shank dia:19.4mm,25mm,30mm, ... 33mm,38mm,etc.8.Blast furnace tap hole drill tools.(Rod, Cross type bits, button ...