The coil screw is a kind of rebar, but there are differences between the two. For example, there are differences in the shape of the two, the rebar is linear, and the screw is generally disc. Terdapat perbezaan diameter kedua, rebarnya agak tebal, diameternya kebanyakannya kira -kira 10 hingga 34 mm, dan panjangnya kira -kira 9 meter atau 12 meter. The diameter of the coil screw is mostly no more than 10 mm, and it can be arbitrarily intercepted.