Complete set of (6) transfer case / transmission skid plate nutserts / rivnuts to replace spinning or damaged nutserts in the frame rail, plus the tool to install them. These nutserts are heavy duty, Made in the USA and are yellow zinc plated for excellent corrosion resistance. These are not the light duty nutserts that are commonly available. They have better resistance to "spin out," the most common failure of nutserts, over the factory nutserts. These crimp down tighter and grip better than the originals that commonly fail. They are larger diameter giving them increased surface area to grip, 11/16" OD vs. the smaller factory 5/8" OD nutserts, so increasing the size of the holes in the frame by 1/16" will be necessary. This can also be beneficial if your frame holes are stretched or rusted on the edges making them larger than the 5/8" they originally were, which is most likely the case if your original nutserts are spinning. The internal thread is the same size as factory. For all 2003-2006 Wrangler TJ's and Unlimited LJ's. Installation tool includes: Tap bolt, nut, washer and thrust bearing. Includes instructions for installation. Note: For 1987-2002 YJ's and TJ's use ASIN B0CRT5FSGY.