For the amateur re-modeler or hobby electrician (with limited skills all things electric), this is a handy (and necessary) little tool.  While I prefer to switch off the electricity at the circuit panel, I use the voltage tester nonstop. I seem unable to understand more than the very basics about electricity (even while perusing all kinds of how-to books) and thus my motto is better be safe than sorry.  So far, the tester hasn't failed me.  I would have recommended that a small, protective (pocket) pouch be added to the (seemingly fragile) tester (for example, when stored in a tool bag, i.e. not ready for service in a shirt pocket.)  I did purchase a separate pouch (through Amazon) to safeguard the tester while I have it put away in my (amateur) electricians tool bag.