Hot rolled steel rebar for the concrete pre-stressing is reinforced straight steel bar with high strength and high dimensional accuracy external thread . 
This kind of rebar can be connected at any cross section with rebar coupler for anchoring and connection of two rebars.
The reinforcing rebar is widely used in large-scale projects, such as water dams, bridges, highways, railways, power stations, and some other ground anchoring projects. It plays a important role of easy connection and anchoring with strong adhesion, solid stretching and anchoring. It's very convenient for construction work, as well as cost effective for saving steel, area and weight of components.