I like that it had the most common scales to use with maps.

All I've needed so far is 1/24,000 scale, bu the 1/25,000 and 1/50,000 (military scale) sometimes makes planning a bit confusing.

Even though we are issued protractors in the military for Land Nav I purchased this one as I found it much more accurate when plotting using 1:50,000 scale

So nice to have 1:24,000 scale to read civilian maps, and the other scales to read military.

Nice durable map scale

This makes jumping between map scales ridiculously easy