For brake lines... all they sell at AUtozone is the single flare kit... is a single flare ok for brake lines? can't find a double???

 

You should most definately use a "double flare" for any brake lines. I'vs seen double flaring kits at local auto parts stores, but here is a link to order one from The Tool Warehouse: http://www.thetoolwarehouse.net/shop/TTW58.html#959 Also do a Google search there should be plenty of other sites to order a kit from if you can't find one locally.