These display clips are made of plastic which can be adjusted in size to hold each size of mounting block. The sign clip is nice and sturdy, which is grippy enough to tilt or rotate the sign in any direction for a complete display. Dual Clip Design: (two clips) base clip for the holder, cross clip for the sign. With the pop-up open, insert the rod through the hole closest to the clevis, then attach the card to the rod on the other side of the POP clip sign holder. Free loading and unloading, free rotation of the top horizontal clip. Wide application: The clip-on sign clips can be used as price and merchandise display in a store, supermarket or other shopping mall, displays and exhibitions for advertising purposes, displaying notes, reminders and photographs at home or in the office, etc. Strong clamping force: Two anti-slip mats inside the clip, no need to worry about the clip moving. With a super clamp opening, the rotating clip allows you to adjust it to an optimal position, easy to clamp, to a rack or shelf. Suitable for cylindrical objects, plates, square tubes, partitions, round tubes, etc. Suitable for price display: Combine the clip-on sign with any sales sign, policy sign or other cards offered by supply stores, shopping malls, supermarkets, fruit stores, retail stores and warehouses that attract customers.