Pandahall 500pcs 10g 3mm Brass Tube Crimp End Beads Tiny Column Lined End Spacer Terminators Tips Silver Cadmium Free Lead Free Nickel Safe Brass Crimp Beads, Crimp Tubes, Column Lined Shape Size: approx 3x3mm, Hole: 2.5mm; about 500pcs/10g. Crimp beads are used with all beading wire to secure the start and finish of the strand. Thread through the crimp bead, around the clasp loop, back through the crimp bead and draw the beading wire taut. These components are used to finish stringing materials like jewelry wire. Use crimp tubes and beads to attach jump rings or to hold beads in place. These durable little findings will provide your designs with security and add professional finishing touches. This 3mm tube sterling metal crimp bead is excellent when used as a spacer in tin cup or floater necklaces. When crimped properly with a crimp tool, this tiny crimp doesn't detract from your design, and looks quite nice.