Regarding this Magnetic Torpedo Level Feature: V-Groove Working Edge: Fits on Pipe or Conduit; Aluminum Frame: Shock resistance; Top-read Window: Easy to read from any position; Hanging Hole: Easy to store; Strong Magnetic Edge: This allows the level to stay in place along a beam for hands-free work; High Contrast Vial Surround: Contributes to measure; 3 Different Angle: 45° / 90°/ 180° for measuring. Specifications: Length: 9 inches; Measuring method: 45° / 90°/ 180°; What’s in the package: Magnetic Torpedo Level; Satisfaction Warranty We attach great importance to your experience of usage, If you have any problems, please feel free to contact us. We will provide you with returns or replacements guaranteed.