Correct the alignment on scissor blades. Plastic
Fast service and completely as described.
I've been using a metal setting block for a long time but occasionally the shears get marked up from the bending block so that lead me to search for a plastic block. Unfortunately, this one does not have very deep or wide slots so it's not possible to get the blade in very far and it's a bit bulky so it would sit up to high on my RE machine.