Solves one of the most difficult wire EDM operations.
Starting a wire cut into the edge or side of the work piece without the advantage of a starting hole.
1 PCE 25 x 55 mm
1 PCE 50 x 55 mm
So you can combine the two pireces to make an artificial hole with a height of 25, 50, 55, 105 or 110 mm.
(Depending on if you use the separately or if you mount them together).