2001-2004 Nissan/Datsun Frontier Roof Racks

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

SKU	Name	USD
8-00-7660-BK	EXR 'WEEKENDER-7660' Black Crossbars - (2) 40" Solid bars, 2.46" above Rails	477.43
8-00-7760-BK	EXR 'WEEKENDER-7760' Black Crossbars - (2) 40" Click-In bars, 2.46" above Rails	717.83
8-00-7661-BK	EXR 'CAMPER-7661' Black Crossbars - (3) 40" Solid bars, 2.46" above Rails	839.17
8-00-7760-RD	EXR 'WEEKENDER-7760' Red Crossbars - (2) 40" Click-In bars, 2.46" above Rails	845.03
8-00-7761-BK	EXR 'CAMPER-7761' Black Crossbars - (3) 40" Click-In bars, 2.46" above Rails	1035.79
8-00-7761-RD	EXR 'CAMPER-7761' Red Crossbars - (3) 40" Click-In bars, 2.46" above Rails	1226.59