This video explains the best levels for electricians. The first type is the torpedo level which can be used for bending pipes. They are super cheap, but you can find expensive options. If the torpedo is made of metallic materials, the level may mark the walls during use, which could get you in trouble with the homeowner. To prevent torpedo levels from marking walls, put masking tape on the edges of the level.
Apart from the torpedo level, the best electricians also use Klein levels. They are relatively affordable, costing about $30 each. Additionally, they are smaller and have rare magnets that attach the level to any metal you’re working on. Klein level features are quite prominent, giving you the best experience when viewing levels. Similarly, you will also want to put masking tape around the edges to avoid marking the wall.
You can use a Klein level and a torpedo level together to bend pipes. However, you should bind them using a clamp to ensure an accurate reading. Alternatively, use one level that suits your construction job.