This is what you need to mount your custom bumper to your Jeep Wrangler TJ or YJ. This kit includes two CNC machined 3/4" thick high-grade steel plates and two slotted lower frame tabs. The main plates are threaded for 1/2: x 13TPI bolts or studs. We offer the mounting studs as optional - they are much easier to use than regular bolts. This mount kit keeps the bumper as close to the stock crossmember as possible to reduce the leverage on your Jeep frame making it stronger and looking better.