4Pcs Small Circular Bubble Levels with Double Sided Adhesive Bottom Mini Little Stick-on Bubble Spirit Level Measuring Layout Tools Levels (25x10mm)

Summary: I picked these up as a replacement for a level on my golf monitor, and they worked perfectly. Simple, accurate, and exactly what I needed. How I used it: Used to level a golf monitor, but would work for any small leveling application. Pros: Very compact—about the size of a quarter Easy to use and install Accurate and does exactly what it’s supposed to Durable for such a small item Packaging is well done and makes it easy to store extras Cons: None so far What I wish I knew: These are smaller than you might expect, but that actually makes them more versatile for tight spaces. Verdict: A great little level that’s perfect for precise, small applications. Worked exactly as needed, and I’d definitely buy again.

Basic bubble with good adhesive. It doesn't need to be any fancier than that.

I purchased these to put on the back end of my cordless drill. Perfect aid to drilling straight holes. I have a Porter Cable drill. The size is perfect and sticks on the back vent area without obstructing the vent. Very helpful.

While these 15mm x 6mm or 15mm x 8mm levels do what they should I find they are too small to make easily accurate leveling. I found them very difficult to finely tune level on my panoramic tripod head because the bubble target area is just too small. I recommend going with some larger, I found the18mm x 9mm or above sizes to be much easier to adjust to accurate leveling.

These were purchased for my drill as i would need to know how straight the holes being drilled into the material are. Cheap and easy way to get an approximate on the drill angle. Would recommend

Medium size not extremely accurate as others have said. Torpedo level would be better for a telescope tripod.

Very accurate and I use one of these on my motorcycle wheel balancer stand. These have many uses. I'd buy more if needed them

Great little bubble level. They stick well, even in situations where they remain emersed for hours.