2007-2015 Mazda CX-9 Roof Racks

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

SKU	Name	USD
null	EXR 'WEEKENDER-8673' Black Crossbars - (2) 48" Solid bars, 1.76" above Rails	485.63
8-00-8776-BK	EXR 'WEEKENDER-8776' Black Crossbars - (2) 51" Click-In bars, 1.76" above Rails	743.19
8-00-8776-RD	EXR 'WEEKENDER-8776' Red Crossbars - (2) 51" Click-In bars, 1.76" above Rails	853.11
null	EXR 'CAMPER-5674' Black Crossbars - (3) 48" Solid bars, 1.76" above Rails	853.49
8-00-5777-BK	EXR 'CAMPER-5777' Black Crossbars - (3) 51" Click-In bars, 1.76" above Rails	1076.39
8-00-5777-RD	EXR 'CAMPER-5777' Red Crossbars - (3) 51" Click-In bars, 1.76" above Rails	1241.27