Starrett AM-2 Magnetic Angle Meter (also called a clinometer or angle finder).
What it does:
• It’s a handy tool for measuring angles (0° to 90° in any quadrant) — especially useful for pitches, slopes, roof rafters, plumbing, carpentry, or general construction work.
• It has a large, easy-to-read dial with degree markings.
• The magnetic base lets it stick to metal surfaces (like steel beams, pipes, or saw blades) so you can take hands-free readings.