This crimping pliers is only suitable for 2.5mm ball.
The compressed balls can be used e.g. as stoppers for floating designs. The round recess in the jaw of the crimping pliers compresses the ball so that the round shape is maintained - a real advantage over the flat pliers and other pliers!
For wire thicknesses of 0.35 -0.45mm, the bead wire must be passed through the ball twice, e.g. for the end loop on the Clasp.
From wire thicknesses of 0.6mm, the bead wire can also be taken individually.
The crimping pliers are only suitable for compressing crimps, not for other work.