This ball joint kit comes in both un-knurled and knurled housing. This is the NOT KNURLED housing version. For the knurled housing see our KIT106K How to Choose? For older trucks that the ball joints have been replaced in the past, or high mileage trucks, we recommend the knurled version. For newer trucks with the original factory ball joints, or low mileage older trucks, we recommend the un-knurled version What It Fits: Jeep Wrangler JL (2018-2026) 4WD Jeep Gladiator JT (2019-2026) 4WD