Soil Nailing by Monobars (D15mm to D50mm)is a passive system for stabilizing slopes and side-hill cuts or rock as well as for stabilizing construction pit walls if deformations are irrelevant. They can be cut by cutting machine and also be able to add by coupler. The yield strength is prepared from 9.7Tons to 236.9Tons. Moreover to increase durability and corrosion resistance, they have to assemble in the form of DCP (Double Corrosion Protected) or SCP (Single Corrosion Protected).