2007-2017 Ford Expedition EL Roof Racks

What's the difference between Solid vs Click-In Crossbars?

SKU	Name	USD
8-00-7670-BK	EXR 'WEEKENDER-7670' Black Crossbars - (2) 40" Solid bars, 1.76" above Rails	502.05
8-00-7776-BK	EXR 'WEEKENDER-7776' Black Crossbars - (2) 51" Click-In bars, 1.76" above Rails	665.99
8-00-7776-RD	EXR 'WEEKENDER-7776' Red Crossbars - (2) 51" Click-In bars, 1.76" above Rails	755.35
8-00-7671-BK	EXR 'CAMPER-7671' Black Crossbars - (3) 40" Solid bars, 1.76" above Rails	834.96
8-00-7777-BK	EXR 'CAMPER-7777' Black Crossbars - (3) 51" Click-In bars, 1.76" above Rails	977.34
8-00-7777-RD	EXR 'CAMPER-7777' Red Crossbars - (3) 51" Click-In bars, 1.76" above Rails	1111.37
8-00-7672-BK	EXR 'OVERLANDER-7672' Black Crossbars - (4) 40" Solid bars, 1.76" above Rails	1120.5
8-00-7778-BK	EXR 'OVERLANDER-7778' Black Crossbars - (4) 51" Click-In bars, 1.76" above Rails	1310.34
8-00-7778-RD	EXR 'OVERLANDER-7778' Red Crossbars - (4) 51" Click-In bars, 1.76" above Rails	1489.05