Triplebubble vial system provides accurate leveling measurements for both vertical and horizontal surfaces, helping you achieve true plumb and level quickly and with less guesswork. Durable ABS plastic construction resists impacts while maintaining measurement precision, providing reliable performance on busy job sites. Integrated elastic loop and dual hooks allow secure attachment to pipes, posts or work surfaces, enabling hands operation and versatile mounting options. Compact 125 mm (4.9inch) size fits easily in tool belts or pockets for onthego portability and quick access. Use scenarios Installing wall cabinets, shelves, or picture frames: attach to a stud or surface, use the level to confirm vertical alignment and horizontal level across multiple points for a precise install. Decks, fences, or railing projects: clamp or hang the level on posts or rails to verify level or plumb across sections, ensuring a consistent build. Plumbing or machinery alignment on site: secure to pipes or equipment to check level and alignment during setup or adjustments, reducing rework.