Upgrade your shock bolts with this complete set for all 4 shocks, upper and lower, front and rear. Yellow zinc 10.9 Class (metric equivalent of Grade 8) hardened flange bolts and prevailing torque flange lock nuts. High quality direct OEM replacement. Fits all 2007-2018 Wrangler JK's and Wrangler Unlimited JKU's with factory or aftermarket shocks. Note: This kit is 100% not BS and it absolutly meets the factory spec. It is widely known that the factory suspension bolts used on the JK were the cheapest, poorest fitting thing they could get away with using. Many experience death wobble as a result of the factory suspension bolts. They used the same bolts used on other vehicles, one size fits many, everywhere they could to keep costs down by buying fewer bolts in bulk rather than using the best possible bolt for each location. These are intended to be an upgrade to the factory bolts. The lower shock bolts in particular were fully threaded from the factory so they could be used in multiple locations on multiple vehicles. The problem with them is the threaded section grinds into the shock bushings making their already loose fit, due the thinner threaded section, worse in time. These bolts are shouldered in the section where they contact the shock bushings so they fit tighter, won't grind into the bushings and will reduce play in your suspension that could lead to death wobble. 10.9 Class hardware is equal in strength to Grade 8. It is the spec used for metric sizes. These are the correct metric size bolts for your JK shocks. Yellow zinc plating gives excellent corrosion resistance. The bottom line is, buy this kit if you want the best for your JK. I use them on my own JK. Compatible with Jeep Wrangler JK JKU 2007-2018 10.9 Class / Yellow zinc plated. 10.9 Class hardware is equal in strength to Grade 8. It is the spec used for metric sizes. These are the correct metric size bolts for your JK shocks. Yellow zinc plating gives excellent corrosion resistance. This kit is 100% not BS and it absolutly meets the factory spec. It is widely known that the factory suspension bolts used on the JK were the cheapest, poorest fitting thing they could get away with using. Many experience death wobble as a result of the factory suspension bolts. They used the same bolts used on other vehicles, one size fits many, everywhere they could to keep costs down by buying fewer bolts in bulk rather than using the best possible bolt for each location. These are intended to be an upgrade to the factory bolts. The lower shock bolts in particular were fully threaded from the factory so they could be used in multiple locations on multiple vehicles. The problem with them is the threaded section grinds into the shock bushings making their already loose fit, due the thinner threaded section, worse in time. These bolts are shouldered in the section where they contact the shock bushings so they fit tighter, won't grind into the bushings and will reduce play in your suspension that could lead to death wobble. Buy this kit if you want the best for your JK. I use them on my own JK. Brand Generic Model RO-0045 Set Name Complete Set for Jeep Wrangler JK/JKU (2007-2018) Head Type Flange Size Name M12 Metal Type Alloy Steel Unit Count 1.0 Count Part Number RO-0045 Thread Size M12 Thread Type Metric (Right Hand) Drive System 4WD Finish Types Yellow Zinc Plated Grade Rating Class 10.9 Manufacturer Region Offroad Thread Style Right Hand, Coarse Fastener Size M12 Fastener Type Flange Bolt Item Hardness Grade 10.9, Grade 8 Material Type Alloy Steel Item Type Name Bolts Exterior Finish Yellow Zinc Thread Coverage Partially Threaded Number of Pieces 14 Screw Head Style Flange Manufacturer Grade Class 10.9 Included Components Bolts Warranty Description 1 year replacement warranty Compatible Groove Diameter 12 Millimeters