If you want to have a reading ruler to hand anytime, anywhere, the <strong>Carson MagniLine MT-25</strong> is a great choice. The reading ruler magnifies the subject by 3x and features a bright LED light. This can easily be switched on and off. The reading ruler is also equipped with a spot lens which magnifies by as much as 10x. At no less than 254 mm long, this is a handy accessory for reading.