Protection board for 18650 lithium battery, 3 cells 12V high current 25A with equalization, overcharge protection 12.6V, over-discharge and short circuit protection, 11.1V.

A large, robust tool, the core drill is designed to drill concrete and other materials using a very wide bit sometimes called a bell or a saw. Depending on the nature of the material, you can choose between dry or wet core drilling.