ztweden 70 count pin backs locking pin keepers pin locks metal locking clasp no tool required locking pin backs keepers ztweden <p><b>package included:</b> 70 count pin backs. <br> <b>dimension:</b> top diameter is 10mm and the bottom is 5mm, height is 7mm.<br> <b>usage:</b> great for use in display books, on lanyards, bags, vests, badge, hats, pins,name tags.<br> <b>easy to use:</b> it can match your clothes easily, enhance your art taste. easy on-off action, more convenient to remove and lock. made of durable nickel-plated copper material, more useful.<br> it can keep your pins safe. <br> <br> <b>safe alternative pins keepers:</b> pin backs provide your replacement to the torn screw or wrench locking machismo; keep your objects in place during important moments.<br> <br> pin backs locking clasps are made of nickel-plated copper durable, smooth surface, sturdy and lock your pins firmly to keep them secure.<br> <br> <b>no tools required:</b> easy on-off action, spring loaded fastener simply need you to use one hand to handle it.<br> <br> <b>warm note:</b> these pin backs are not suitable for a lightly thick jackets.</p>