This unique holder increases the usefulness of a Code 1a whiteboard. The holder slots over the top of the easel and can neatly house our full range of overlay sheets, which can then be pulled out from the top. They are prevented from coming all the way out by the attached wooden battens and more than one can be pulled out at a time. This enables one overlay to be used in conjunction with another. ALSO AVAILABLE: Universal Holder and Wall Mounted Overlay Holder.