EXR JEEP WRANGLER JKU (4 door) MULTI-FUNCTION REAR CROSSBAR (with Square holes for Click-In Accessories) - Installs on Jeep JKU (4 door) factory Rear roll bars and usable when Factory soft top is down / removed. No drilling. Once installed, soft top closes perfectly over crossbar bar with no interference. Installs with thumb bolts (included); no tools needed. This MULTI-FUNCTION Crossbar accepts most other mfg roof top accessories and EXR Click-In accessories. Crossbars are made from heavy duty carbon steel, acid washed, electroplated and powder-coated for maximum durability.