Kapro 935-10 Magnetic Cast Torpedo Level with Optivision and Angle Finder, 10-Inch 3 Unbreakable acrylic shockproof vials Vial gradient lines for measuring slopes up to 2 percent grade Angle finder with gradient markings every 5 degree to easily find the degree of any slope Rare-earth magnets for the strongest grip to any metal surface Fine milled surface with v-groove for accurate and easy placement on pipes and curved surfaces