EXR UNIVERSAL O'LAND CROSSBAR - 51" - SOLID (NO SQUARE HOLES) - COMES WITH 5 THREADED HOLES ON THE BOTTOM FOR PATENT PENDING WEIGHT DISTRIBUTION ON HARD TOP VEHICLES. ACCEPTS MOST ROOF TOP ACCESSORIES ON THE MARKET. DOES NOT ACCEPT EXR CLICK-IN ACCESSORIES. CROSSBAR WILL FIT MANY VEHCILES, INCLUDING THE NEW JL JEEP WRANGLER. THIS BAR CAN BE USED UNDER THE SOFT TOP (WITH SOFT TOP BRACKETS) OR ABOVE THE HARD TOP (WITH HARD TOP BRACKETS). FOR JL(U) JEEPS, INSTALLER NEEDS (1) 51" BAR AND (1) 48" BAR. FOR O'LAND TENT PACKAGES INSTALLER NEEDS (2) TO (3) OF 51" BARS. Crossbars are made from heavy duty carbon steel, acid washed, electroplated and powder-coated for maximum durability.