The tweezer is a perfect tool with ceramic heat-consistence tweezers on the one end and a wrench on the other, which allows you to unthread stuck bottom ends with ease. Constructed from high-performance polycarbonate and ceramic. If you have a tightly-fit tank and you cannot pull it apart, this tweezer really helps you out.Fix the tweezer in your atomizer, squeeze it and turn the tank, then you will find it super easy to loosen and unthread the stuck bottom ends. It is a great helper to get your cap out of your RDA as well.