... uncoated With or without coolant hole DOHRE Carbide Twist Drill Bits DOHRE TOOL is a manufacturer of carbide end mills and ... as face milling cutter, carbide twist drill bits, carbide inserts(milling/turning), milling cutters, turning tool holders, collets, pull studs, boring ... D450, 480, D550, D580, and D600, D650, D650G. These drill bit grades will meet your processing needs. 2.There are different ...