2007-2018 Jeep Wrangler JK 2Dr Hard Top Roof Racks

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

SKU	Name	USD
null	9605 BLACK NO DRILL Roof Racks 2007-2018 Jeep Wrangler JK/JKU (2-4dr) Hard Top	495.15
null	9607 BLACK NO DRILL Roof Racks 2007-2018 Jeep Wrangler JKU (2dr) Hard Top	716.84
null	9705 BLACK NO DRILL CLICK-IN Roof Racks Jeep Wrangler JKU (4dr) Hard Top	745.75
null	9705 RED NO DRILL CLICK-IN Roof Racks Jeep Wrangler JKU (4dr) Hard Top	850.95
null	9707 BLACK NO DRILL CLICK-IN Roof Racks Jeep Wrangler JK (2dr) Hard Top	936.8
null	9707 RED NO DRILL CLICK-IN Roof Racks 2007-2018 Jeep Wrangler JK (2dr) Hard Top	1171.14