Displays2go Clip Sign Holders with Plastic Ball Joints, Tilts, Rotates, Anti-Slip Coating, Clear Acrylic, Set of 100 (MEMOS4RD) Sold in a set of 100. Anti-slip coating grips surfaces firmly. Plastic ball joints tilt and rotate signs into custom positions. Clear acrylic construction blends into any environment. Displays2go SKU#: MEMOS4RD