Please use the FIT CHART to determine which bar fits your truck. The powder-coated, steel crossbar can be used for up to 4 racks, depending on your truck bed width. Each rack will use about 12" of rail width.  The bar is inserted into your truck's pre-existing cargo holes.  Cargo holes are standard on most trucks but older models may require drilling. The hole size required is 11/16-inch or larger.   Please allow 7-10 days for shipping and handling.