For the ultimate in precision and accuracy we ve made the Model 701 with graduation in miles for 1:24 000 1:62 500 and 1:250 000 U.S.G.S. maps and in kilometers for 1:25 000 1:50 000 and 1:100 000 scale maps. There are also inch and centimeter graduations for maps of other scales. A revolution counter a reset wheel and a folding magnifier give you even more precision. A vinyl storage pouch is also included.