A special easel designed to hold books open for photography or A/V use. Protects valuable books by putting only the weight of the sheet against the pages and binding. Foam rubber blocks support the thinner open side of the book, gently holding the pages against the glass. The book holder clamps to the baseboard. Glass Working Area: 16 x 13.5" (410 x 310 mm) (WD) Accepts materials to 3.5" (8.9cm) thick.