The ideal mapping compass, they have additional map grid lines for quick orientation and a magnifier for easy reading. TruArc Global Needle system means you don't have to buy a new compass when you make that trek to South America or Australia. 2 degree resolution, tool-less declination adjustment will keep you on course anywhere in the world. 7.4 x 10.6 x 1.5cm, 51 g. Inch/CM scales.