The small 90° barn door locks is constructed of high quality solid zinc alloy and coated with multi-layer coating covering the surface, which can effectively isolate oxygen in the air to be corrosion-resistant, ensuring durability and reliability, can be used for a long time. 【Comes with 2.5mm Thick Door Latch Spacer】: The spacer is made of solid aluminium alloy material; Thickness: 2.5mm; Length: 80mm; Width: 25mm; If the door and the frame/wall are not in the same plane, the sliding barn door locks can be installed by adding this spacer (for example, if the door gap ≤ 2.5mm, you can add one 2.5mm spacer; if 2.5mm<the door gap ≤ 5mm, you need add two 2.5mm spacer)