Bubble Level, Professional Grade With Bending Offset Aid. Mini Torpedo Design With Handy No-Dog Attachment For Bending. Three Rare Earth Magnets Provide Superior Holding Strength. Four Vial Design - 0°, 90°, 45°, and 30°. Machined From Aluminum Alloy and Anodized to Aircraft Standards. Compact Size Fits Easily In Tool Pouch. V-Groove On Bottom For Mounting On Curved Surface.