Crimping right next to the clasp can seriously weaken a piece. Instead, place your crimps next to a soldered jump ring, then wire the clasp to the ring. This provides a moveable joint at the point of greatest stress instead of a sharp metal crimp edge, which can cut the beading wire. Another alternative is to place a bead between the crimp and the clasp. The bead will act as a buffer between the heavily handled clasp and the metal edge of the crimp.