The LockJaw® Kevlar Upgrade Kit is the ultimate enhancement for your synthetic shackle, providing even further cut and fire resistance where it is needed. Each upgrade kit includes one kevlar sleeve and matching lock that can be used to upgrade both LockJaw Lifting and Non-Lifting Synthetic Shackles, as well as LockJaw Winch Lines w/ Integrated Shackles. All upgrade kits are proudly made in the USA.