They look like a bead, so it gives the design a more finished look. WHAT YOU GET: Contains 200 pieces stainless steel bead tips knot covers; Size: about 0.2"/5mm long, 0.12"/3mm wide, 0.08"/2mm thick, hole: 0.04"/1mm, inner diameter: 0.12"/3mm MATERIAL QUALITY: These bead tips knot covers are made of quality stainless steel material, which is tarnish resistant, and skin friendly. Ideal for everyday use WIDE USAGES: Bead Tips Knot Covers are used to conceal knots at the ends of beaded strands and to connect the strands to the clasp. Great sizes and secure styles in these versatile, all time favorite components VERSATILE FUNCTIONS: Crimp covers are open on one side allowing them to slip over the crimp tube. They are designed to fit over the crimped bead. They look like a bead, so it gives the design a more finished look. They are used with beading wire to secure the start and finish of the strand by crimping the crimp beads BEAD TIPS: Using the right size crimp bead is also very important. If the crimp is too large for the jewelry wire, it won't be able to grip the wire properly and it could slip, causing the jewelry piece to fail. If the crimp is too small, particularly with crimp beads, the jewelry wire won't have room to separate for the crimp action and you won't get a good fold