EXR JEEP WRANGLER JK (2 door) and JKU (4 door) MULTI-FUNCTION MID CROSSBAR (with Square holes for Click-In Accessories) - Comes with 2 threaded holes on the bottom that allow this bar to be installed on Jeep JK (2 door) and JKU (4 door) factory 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 Jeeps two Hand bolts (often comes with Jeep, but available separately if needed: 8-00-9902). Bar also fits on top of the HARD TOP with the addition of (1) of 8-00-9790 Hard Top brackets (1 pair in box fits 1 bar). This MULTI-FUNCTION Crossbar accepts most other mfg roof top accessories and accept EXR Click-In accessories. Crossbars are made from heavy duty carbon steel, acid washed, electroplated and powder-coated for maximum durability.