I. Classification according to the weight of the hammer head
Lightweight ramshorn hammers
Light weight, usually between 200 - 400 grams. These hammers are easy to carry and handle, and are suitable for some delicate carpentry work or simple household repairs. For example, when installing small picture frames or repairing small parts of furniture, a lightweight crochet hammer can provide enough striking force to drive in small nails without being too heavy to control the force when pulling nails.
Heavy Duty Hammers
Typically weighs 800 grams or more. Heavy Duty Hammers have a high striking power and are mainly used for construction work, large scale woodworking and other jobs that require a high level of force. On the construction site, when building wooden structural frames or dismantling old wooden frames, heavy-duty croquet hammers can nail longer and thicker nails more effectively, and can easily pull out the nails that are deeply nailed into the wood.
Second, according to the material classification