A hammer is a type of hand tool that is used for striking an object. There are a variety of sizes and types of hammers that exist, and they are designed for specific tasks. For example, some tools are for striking surfaces that are resilient, while others are for moderately tough. Some hammers are for carpentry, as well as for making cabinets and assembling furniture. You can also find a striking tool that lets you pull nails and bend or shape metals.
It also helps to understand what you are most comfortable with. Since there are different sizes available, they can vary in weight as well. You do not have to buy a hammer that is too heavy for you, which can only lead to problems with your wrist, for example. On the other hand, when a hammer is too light for you, it can cause trouble as well.