Material: these D shaped shackles are made of zinc alloy, they are strong and not easy to break, also they are not easy to deform or get rust, suitable for long-term use, and they can bring you nice using experiences on crafts making Q'ty: You will receive 8 pieces per pack. Size:crossbar width of D ring is inner 1''(2.5 cm),it's suitable for 1'' or less wide of webbing or straps;Height (From Roof to crossbar) is 1.1'(28mm).Wire Thickness: approx 0.45cm. Easy to use: these d-rings with screws are easy for you to install, you just need a screwdriver to loosen the screws and replace old rings,then tighten the screws.it will make your repairing or craft work more convenient. Wide usage: it's a great replacements for your leather purses, bags, handbags, shopping bags, crossbodys, car keys, key rings and so on.