Very inaccurate, very poorly made. Useless laser. I was so incredibly disappointed with this purchase that I immediately returned it. The laser also always emits 3 beams, which makes it dangerous in the workplace. I couldn't believe how awful this level was. Instead I decided to just buy a cheap green laser and mount it on my aluminum spirit level and it works great, I've been using it since the day I heard that useless poorly made excuse for "bubble level" got back.
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