5 Piece Koken 1/2" Drive Wobble/Fix Extension Set (PK4763/5)

I purchased these after hearing many good things about Koken tools. I wanted a set of extensions to handle the variable space limitations which inevitably occur. After using these I purchased the 3/8" and 1/4" versions because they are simply that good. The ability to have both a rigid and wobble extension in one unit is a big time saver. Push the socket all the way on and it's a rigid extension, slide it off slightly and it's a wobble extension. Pure genius. The knurling on the end helps when starting nuts and bolts in tight spaces with greasy fingers. I can't say enough good things about these extensions.