HSS Step Drill Bitsstraight flute 3flat shankStep Drill Bits are perfect for drilling multiple-size holes in thin sections of metal, plastic and wood using...
Beijing superior Drilling Equipment Co., Ltd is a comprehensive enterprise set PDC bits, tricone bits production sales. The company was founded in 1989, covers an are...
Casing Tubes:Coupled type casing tubes have a box thread at both ends and are connected together by a pin-to-pin coupling. This allows coupl...