Grade Facility lasers account for most of the Rotary Laser Levels you see (either out of the box or with optional accessories like a remote). As the name suggests the laser has the "facility" to tilt the beam and allows you to set a gradient or fall. However, it is an entirely manual process that requires you to calculate the exact gradient the laser is angled to.

Note: Some Lasers require a Remote Control to unlock the Grade Facility mode.

True Grade lasers are specifically designed to make gradients and slopes as easy as possible and you do this by keying in a percentage value directly into the keypad for both the X & Y-axis. The Laser then automatically tilts the laser head to the exact gradient entered. As an example, if you wanted to set a 1:40 fall you would look at your conversion chart which would show that it's a 2.5% fall and so in the X-axis you would enter 2.5% and then the laser would tilt to that value. You know you have then entered a 1:40 fall for your drain run.