Types
Claw hammers can be constructed many ways but generally come in one of two forms. The first, and most popular, type of hammer is the two piece hammer. This hammer is constructed from a forged steel head with a hole for fixing a handle. One end is made to fit the hole in the hammer head, then a steel wedge is driven into the wood which forces it to expand and secure the hammer head to the handle. Other handle materials include glass fiber and even carbon fiber.
Another type of claw hammer is single-piece forged heat-treated steel where the head and handle are integral. These hammers often have polymer grips to add to their ergonomics and decrease vibrations when the hammer is used.
Another type of claw hammer is the framing hammer. This is an over-sized claw hammer used in framing carpentry. The larger and heavier head can decrease the number of blows required to fully insert the nail. Framing hammers commonly have a "checkered" face, which reduces skip-off of the head if the blow is not precisely struck on the nail. The slight indentations left on the wood by the checkered face are considered unimportant in rough carpentry. Framing hammers also have a much straighter claw than regular claw hammers, as the claw is designed more for prying nailed boards apart, rather than removing nails (though its claw can also be used in that capacity).
The size of this type of hammer is commonly designated by the weight of its head, which may range from 7-32 ounces.
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