Square Baler Wire Baler wire is primarily used to manually bale hay, wheat or straw bales. Our black annealed baler wire has a long-lasting oil coating that protects the wire from rust and corrosion, and is easy to install in any baler. Advantages Easy to unwind Easy to install and operate on any baling equipment Tape retains its original shape during use Minimises wire waste Won't get stuck in equipment Long-lasting cord lubrication