Feature : (1) The bolts have high strength stress ,good support capacity can prevent the roof from sinking down ,and the strata sliding . (2) Fast and easy installation by mechanized tools. (3) Be used with resin anchoring cartridge for permanent support . (4) Be used in high stressed ,large deformed area . (5) Low price, widely used in coal mines, railways, hydropower and other types of roadway projects. (6)Thread profile has higher strength than rod and offers excellent mixing capabilities in resins installation 2.PROPERTY: