Rebar, also known as reinforcement steel and reinforcing steel, is a steel bar or mesh of steel wires used in reinforced concrete and masonry structures to strengthen and hold the concrete in tension. To improve the quality of the bond with the concrete, the surface of rebar is often patterned.

The safest and easiest way of bending rebar by hand is to encase it inside two pieces of metal piping — a shorter piece, and a longer piece. … You’ll need an adequate amount of muscle to bend the sturdy steel rod, but the leverage you’ll gain from using a longer piece of pipe will help move the process along.