Holding device with glass pressure plate for exact positioning when doing copy work from books, magazines and newspapers. Solid base plate with non-slip coating on top and non-slip feet underneath. 6 mm (0.2 in.) thick glass pressure plate, foldable and variable in height. To work more ergonomically, more efficiently and original-friendly at a particular height, you can lock the glass pressure plate into a position between 0 and 145 mm (5.7 in.).