When I changed engines for a living, those wobble extensions were in constant use.. But even better than that, I had wobble sockets, with a universal built right in the socket.. Full set of 3/8 impacts for may small air wrench, and a few sizes of 1/2 drive for bellhousing bolts. .Those got me to some pretty hard to get bolts. And when the bolts are rusted off, a set of rounded bolt remover sockets works wonders...(Think exhaust manifold bolts...) And I still cannot live without some really long extensions...24 inch and 3 foot ones. Good strong thick ones for breaking tight bolts you can't get close to. Lots of times those bolts you swear the engineers were out to get the mechanics with are easy to get to if you got a bit farther back on them.