Hexagonal hollow drill bit and connected sets 

 Hexagonal hollow drill bit and connected sets product details: 
 B19 drill pipe and drill bolt connections within a thread of M14 × 1.5 or square teeth, length 0.4 to 2.8 meters, as length and connection should be specified in the contract. Anchor drill pipe length of 1 m / root, the user needs other specifications can be customized. 
 Drill pipe drill pipe connection sleeve connected sets of anchor side × side teeth tooth 
 Connected sets of drill teeth × M14 × 1.5 square 
 Company drill:. Drill: Cross drill, word drill, air drill, coal drill bits, PDC anchor bits, PDC drill bits, PDC bits, carbide drill bolt, diamond three wing drill, concave three wing non-core drill, no core drills, drill head, drill bit connected sets, drilling, connected sets, bolt connection sets, connection sleeve anchor, drill pipe connection sleeve, fiber tail, 
 Phone: 0537-2165458 
 Fax: 0537--2530678 
 Mobile: 15069731211 
 QQ: 1399893937 
 Manager: Zhang Song 
 Website: www.bafangjixie.com 
 E-mail: 1399893937@qq.com 
 Octagon Mining Machinery Co., Ltd. Jining