Body clearance diameter of the twist drill bitsThe portion of the land that has been cut away so it will not bind against the walls of the hole when drilling with twist drill bits

Axis of the twist drill bitsThe imaginary straignt line which forms the lengthwise center of a twist drill bits

Body of the twist drill bitsThe section of a drill from the shank to the outer edges of the cutting lips

Characteristic of the Roll forged double end Drill bitsThe roll forged drill bits can saving in materialIt is very convenient for useThe double end drill bits can improve the efficiency

HSS fully ground jet point tip drill bitsThe jet point tip drill bits can reduce drilling resistance and its axial force reduces nearly 30% and torque reduces 15% compare with normal drill bits.The je ...

HSS brad point wood drill bitsThe drill bits made of high speed steel with brad point and 2 shouldered cutting spurs.A much longer cutting life than high carton steel wood drill bits.The choice for th ...