In article ,
John Rumm writes:
The shaped blade ensures no tell tale marks from the corners of
the trowel (without having top spend weeks wearing the blade in).

In which direction is the blade curved?
Is it like a section cut from a cylinder with axis parallel to
the handle (which would be fine as the edges are still straight),
or is it like a section cut from a sphere (which sounds like a
disaster as the edges will be curved)?

--
Andrew Gabriel