Utilizing a more traditional design, the Conventional uses Alnico ll magnets and a "V" cut sapphire jewel bearing for smooth movement. Conventional suspension offers premium performance when used within a balancing region. Because the body is die cast aluminum, the Conventional is both accurate and durable. The 5005 LM comes with a quadrant dial which use a 0° to 90° to 0° etc format. The Brunton international transit can work in any hemisphere, anywhere in the world, hence the name. However, if you want peace of mind, we can have the instrument balanced for particular zone.