These contractor quality loop ties or bar ties can be used in everything from tying sand bags to heavy construction, particularly in reinforcing concrete structures. They are made of annealed wire and are bent into a loop at both ends, allowing them to be easily secured around rebar or other structural elements. Loop ties serve to hold together the reinforcing bars in position before concrete is poured. This helps maintain the proper spacing and alignment of the bars, ensuring the structural integrity and strength of the finished concrete. We package our ties in convenient 5000 pc bags that come with 5 individual rolls of 1000 in each bag. Always look for the bar ties in the green bag to make sure they are Arizona Wire Products and not imitators.