The PBT Metric and Imperial Stud Kits, Nos. 71120 and 71121, are designed to remove and install mounting studs without damaging the thread. The dedicated two-piece removal tool is screwed onto the stud then tensioned to lock onto the stud for removal. The install tool allows the stud to be installed and tensioned, then an internal set screw is reversed to remove the tool. The tools are manufactured from high-grade tempered steel for durability. The kits come in a custom blow mold storage case.