Wide angle view of a building being constructed using rebar, rebar is commonly used by the tower and sign structure industries as anchor rods for large structures. The diameter of the jumbo rebar is slightly over-sized than the normal #14 & #18 rebar so that it can be milled down to account for the differences in diameter from the rebar deformations in order to create a uniformed surface so that the threads can be applied to accept 1-3 4? & 2-1 4? nuts.