The Leica Rugby CLA is the first upgradable rotary laser level with a very robust design that can be adapted to all construction site applications. So you can use the CLA Basic, and add options, such as the CLX 700 adding +-15% fully automatic grade functionality in a second axis with a dial-in option, the upgrade delivers the most reliable performance in dual slope applications. This rotary laser is the most reliable and durable alternative for contractors. *Video credit: Leica Geosystem