Depending on the store, there are certain items that hold great monetary value, and therefore need to be kept with extra security. These days there are many different ways in which you can keep something extra safe in a store, whilst it is still being on display for customers to see.
But the only thing with this is, the security tag needs to sit on the product securely enough so that it can’t find its way off somehow. A drill is a very expensive item and the way that this security tag was placed made it look very easy to take off. When someone asks you to do something, it is best you do it right the first time.