50 Pieces Pin Backs Aroko Locking Bulk Metal Pin Keepers Locking Clasp (Silver) NO TOOLS REQUIRED: clutch with spring fastener slices allow you to install and remove it easily, handy and convenient for use Durable and sturdy: clutch backs and blank pins are made of brass, sturdy and light, lock pins firmly and keep them secure MATERIAL AND SIZE: nickel-plated copper pin lock backs 1 cm in diameter, 0.6 cm in height PACKAGE: 50 Pieces pin keeper lock with 1 storage case. Keep your lock pins safe Great for pins,name tags.etc Great for use in display books, on lanyards, bags, vests, badge and hats.Use as lapel flower pins for men, cufflink pins, scarf pins, brooch pins for women & more PRODUCT WARRANTY AND CUSTOMER SERVICE - We provide 48-day money-back and 24-month warranty for all the items that SOLD BY Aroko Official Store. So feel free to contact us if you have any question.