The 10 universal shelf clamps are suitable for 3-18mm thick shelves, including glossy and glass shelves. Suitable for different types of storage shelves, mirror finish Easy to install, zinc alloy made, durable, reliable, long service life; Comes with installation screws Suitable for glass/wood thicknesses from 3mm to 18mm, providing flexibility for a variety of indoor scenarios. Ideal choice for bookshelf, exhibition stand, garden shelf, external wall brackets and bathroom shelf, etc Simple design and elegant appearance. No mounting screws or hardware are visible once installed and bring a refined sense to your home