Strong and Durable Steel wire ties are designed with an easy to install, Low profile, Self-Locking ball bearing head. These metal ties do not required any tools for installation and having rounded edges which is safer for handling and saves your hands from Abrasion. It is Flexible and very simple to use. Only Need A Set Of Needle Nose Plier To Tighten And A Diagonal Plier Or Tin Snips To Cut The Zip Tie