Review on W38151 Wobble Extension: Enhancing Performance and Flexibility in Tool Usage by Mike Sutherland

Pros: Strong, solid connection of ratchet and socket, provides non-slip oscillation Cons: Few degrees of oscillation, not vertical, This may not work , when you need a lot of distraction. I use this to change my oil and it works like a charm. Ideal for situations where you can't hit a bolt or nut directly.