Black Breakaway Clasp Cord: package includes 1 roll black nylon strings and 30pcs black plastic breakaway clasps; classic color and style enough quantity can meet your different needs in daily life Size: Details cylindrical jewelry clasps are 20mm(0.7") in length 11mm(0.4") in width hole 4.5mm; perfect hole size for less 4mm cords. The nylon lanyard cord is 2mm in diameter 10.9 yards(10m)/roll Quality Material: the breakaway lanyard clips are made of plastic simple cute lightweight and durable; and the string is made of nylon well-made and inelastic; suitable for most types of clothes. Safe from falling off difficult to come apart Easy to Use: these DIY breakaway lanyard clasps are easy to use you only need to insert the rope less than 4mm to be connected into the button and then close the button easy to close and open without complex steps when in use Wide Usage: the necklace string and clasps are perfect for lock design that connects bracelets necklaces gum necklaces lanyards keychains waist chains ankelts and strap lanyards; can be used for bags clothing shoes hats lanyards keychains etc Black Breakaway Clasp Cord: package includes 1 roll black nylon strings and 30pcs black plastic breakaway clasps; classic color and style enough quantity can meet your different needs in daily life Size: Details cylindrical jewelry clasps are 20mm(0.7") in length 11mm(0.4") in width hole 4.5mm; perfect hole size for less 4mm cords. The nylon lanyard cord is 2mm in diameter 10.9 yards(10m)/roll Quality Material: the breakaway lanyard clips are made of plastic simple cute lightweight and durable; and the string is made of nylon well-made and inelastic; suitable for most types of clothes. Safe from falling off difficult to come apart Easy to Use: these DIY breakaway lanyard clasps are easy to use you only need to insert the rope less than 4mm to be connected into the button and then close the button easy to close and open without complex steps when in use Wide Usage: the necklace string and clasps are perfect for lock design that connects bracelets necklaces gum necklaces lanyards keychains waist chains ankelts and strap lanyards; can be used for bags clothing shoes hats lanyards keychains etc