Claw hammer is a very common type of hammer, commonly used for striking or pulling nails. Its hammer head is bent, with one side used to drive nails into the material and the other side used to lift nails. The weight of a claw hammer is usually between 16 and 24 ounces, making it very suitable for most household repair work. Due to its high frequency of use, claw hammers are very popular in the construction industry and DIY market.