4 bottles: The torpedo level with high visibility bubble is easy to read and we have 4 angles to choose from: 0/30/45/90. These vials have an accuracy of 0.5 mm/m for clear and precise measurements. The large bottle window allows easy reading from multiple angles: front, back or top. Strong magnetism: The 4-piece magnet has a strong adsorption magnetic surface, providing excellent adsorption force, the torpedo level can be attached to iron pipes, conduits or other metal surfaces. The magnetic design saves your hands from having to hold the level all the time. Durable material and thumbscrews: The torpedo level is made of aluminum alloy for excellent durability and accuracy. Thumbscrews attach a level to the pipe to measure the angle when bending. This feature makes measuring water pipes easier. V-groove and double scale: The edge of the V-groove means this sports car level is reasonably stable on cylindrical materials like pipes and PVC conduits. This level tool also offers SAE and metric precision measurements to meet different measuring needs. CONVENIENT AND WIDE APPLICATIONS: This level is lightweight and small in size, making it easy to carry and to store, especially in small spaces . Torpedo levels are designed for decorating, furniture and related alignment work, such as measuring positions on walls, spaces between hangers and leveling nails. Bottle Accuracy: 0.5 mm/meter Scale: 13 cm in total length, accuracy of 1 mm in total length Magnet: NdFeB N45 Material of frame: aluminum alloy Knurled screws are attached to the pipe to measure the angle when it bends. This feature makes measuring water pipes easier. The V-groove edge means this torpedo level has reasonable stability on cylindrical materials such as PVC pipes and conduit. Level features 5.1 in. (13 cm) metric and imperial graduations on top. You can choose and use them according to your needs. This level is available in 5.1 inch (13 cm) SAE and metric precision measurements, suitable for different measuring requirements.