Crimp tubes are great for multiple strands of beading wire, a single strand would get lost in these! Thread a tube onto the beading wires, add your clasp then double back through the tube. Use half round nosed pliers to flatten the tube, don't try crimping pliers as the tubes are too big. The loose ends of the beading wire can then be trimmed, or if your piece is fully beaded thread them back through the last few beads for a neat finish.