Quote Originally Posted by Lloyd Barnes View Post
That was my logic too but the inserts still seem to be available in left or right handed versions which makes no sense to me.
You mean for the tools that can be used both for turning & milling like the one I linked to?
It's because you do need left and right hand inserts for some turning operations, I always thread away from a shoulder and from the bottom of a hole outwards and it's handy to have both LH & RH threading inserts.