Vertical Sign Holder features a self-standing construction for quick sign placement on any flat surface. Clear construction ensures your literature is completely visible from both sides. Easy-to-use design allows you to simply slide materials inside from the bottom for quick updates. Use sign holder with letter-size items.Vertical Sign Holder features a self-standing construction for quick sign placement on any flat surface. Clear construction ensures your literature is completely visible from both sides. Easy-to-use design allows you to simply slide materials inside from the bottom for quick updates. Use sign holder with letter-size items.