... 1.FRP rock bolt with full thread 2.Material: fiber glass reinforced plastic 3.High tensile strength 4.Full thread FRP rock bolt ... by pultrusion process.Product Features:1.All thread FRP bolt2.Safety, no sparks out of direct cutting3.Light weight, only ... to electromagnetic wave, good for concealing of the workApplication Field:Hard rock mining, Ground stabilization,Salt mines, Tunneling, Tiebacks, ...