Found on hammer that came with my all-in-one ultimate combination flashlight, car signal, emergancy siren, AM/FM radio, portable tookit along with tape measure (WITH FRACTIONS), adjustable plieres, and tire gauge

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CAUTION:

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This hammer normally use for flat head common ( unhardened ) nail ( max size 0.131 x 2.5" ,8d,) shall be driven into sound pine joists beams, or layers of planks Made in China