Details from BCA:

The BCA Slope Meter is a lightweight multi-use tool for your pack.

Designed with an inclinometer and a built-in compass to measure slope angle and aspect, this appliance is pocket-friendly and easy to carry with a lanyard attachment point.

This Backcountry Access product has a metal ball inside a liquid-filled tube that measures the slopes angle when placed perpendicular to the snow. With an angle range of zero to sixty degrees, you can test to see if a slope is too steep and avalanche prone. Stabilizing quickly for fast reading, this product is essential for a safe backcountry experience.

Flip the meter over and you can use the sharp edges to remove excess snow from your skins.