The K&M 12440 Uni-Boy “Book” set includes 22 colourful page holders designed to keep sheet music, books or manuals securely open on music stands, desks or tables. Lightweight and easy to clip into place, each Uni-Boy provides reliable page control without damaging the paper, making them ideal for schools, ensembles, teaching studios and busy rehearsal environments. Supplied in a mixed pack of blue, red, yellow and green, they offer a practical, long-lasting solution for keeping pages tidy, flat and easy to read.