Hey all-

Snapped up a 1987 Schwinn Tempo off CL for $150 and am trying to put some upgrades in.

In working on the seat,however, Ive come across a bolt ive never seen before



It looks like I need two wrenches for this. When I turn one bolt, it locks in place on the other side. Is that true that I need to turn each bolt at the same time?

Also, the seat itself has a bolt that is completely stuck.




Any tips for getting it off? It is a tough angle to get any leverage.