Complete set of (4) Grade 8 hardened yellow zinc plated fine thread bolts, (8) washers and (4) lock nuts. These 9/16" bolts are an upgrade to the factory bolts which were undersized (M14) on the lower control arms. These will fit tighter than the poor fitting factory bolts reducing play in the suspension that can lead to death wobble. No drilling is required. Everything included is Grade 8, even the washers. Other kits out there will bait and switch you advertising all Grade 8 hardware but then send lower grade nuts and washers thinking you won't notice. You won't have that problem here. Fits the front or rear lower control arms on 2007-2018 Wrangler JK and Unlimited JKU. This set is for either front or rear, if you need both order 2 sets. Fits the rear lower control arms on 2018-2025 Wrangler JL and JLU. DOES NOT FIT THE FRONT ON JL OR JLU. USE ASIN B0CNB9XKCF FOR JL or JLU FRONT LOWER. High quality direct OEM replacement. Works with factory or aftermarket control arms. Sold by a small business in the US.