1. Good safety property: No sparks out of direct cutting. It's convenient for the extraction opreation, and can improve the coal output and safety property.

2.High tensile strength: Tensile strength of the bar can reach 850Mpa, and every part of the bar has the same tensile strength.It can meet the requirement of the super-high strength.

3.Strong anchoring strngth: the strength is equated with the bar itself.

4. Torque moment is more than 70N.M, no breaking will happen even there is a crack.

5.The bar is light: Weight of the bar is approx. 25% of the steel ones in the same specifications.

6.Anticrossion and anti-ageing: I t can be used for permanent supporting.

7.No reflection to the electromagenetic wave

8.Strong load bearing ability