2008-2012 Ford Escape Roof Racks

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

SKU	Name	USD
8-00-9660-BK	EXR 'WEEKENDER-9660' Black Crossbars - (2) 40" Solid bars, 2.46" above Rails	501.67
8-00-9760-BK	EXR 'WEEKENDER-9760' Black Crossbars - (2) 40" Click-In bars, 2.46" above Rails	631.76
8-00-9760-RD	EXR 'WEEKENDER-9760' Red Crossbars - (2) 40" Click-In bars, 2.46" above Rails	711.46
8-00-9661-BK	EXR 'CAMPER-9661' Black Crossbars - (3) 40" Solid bars, 2.46" above Rails	830.71
8-00-9761-BK	EXR 'CAMPER-9761' Black Crossbars - (3) 40" Click-In bars, 2.46" above Rails	926
8-00-9761-RD	EXR 'CAMPER-9761' Red Crossbars - (3) 40" Click-In bars, 2.46" above Rails	1045.54