20 Styles Clasp Connectors: package includes 1 roll of multicolor nylon braided string cord and 40sets of break away safety clasps in 40 styles--including oval and barrel, and rich colors, such as black, white, yellow, blue, green, etc; each style 2 sets. Barrel & Oval Clasps: the plastic clasps are in 2 shapes--oval: about 24mm(0.9") in length, 9mm(0.3") in width, hole 2.5mm; barrel: about 20mm(0.7") in length, 11mm(0.4") in width, hole 4mm; perfect hole size for less 2.5mm cords. The nylon cord is 2mm in diameter, 10.9 yards(10m) in length. Quality Material: the breakaway clasps are made of plastic, not easy to break or deform, lightweight and durable, Chinese knotting cord is made of nylon, touch comfortable, fade-resistant; can be used for a long time. Easy to Use: these DIY breakaway clasps are easy to use, you only need to insert the rope less than 2.5mm to be connected into the clasps, knot the rope, then close the button, easy to close and open, without complex steps when in use. Wide Usage: unisex designed breakaway clasps are perfect for lock design that connects necklace, bracelet, bubble gum necklaces, lanyards, keychains, strap lanyard and other accessories; can be used for bags, clothing, shoes, bags, lanyards, keychains, etc.