Review on 📏 Accurate Measurements with QWORK Vernier Caliper Sliding Measuring by Onsommoshit Mathews

Seems well marked and could be handy in such a small size. The problem is that the sliding part needs to be grooved to keep it in place when sliding in and out. This is grooved and stays in place when closed, but after extending less than 10mm it pops out in 2 pieces unless you push down on it during extension and retraction. It doesn't happen by accident. If you don't make an effort, it will fall apart every time. This makes it very difficult to use unless held just right.