This serious tool is a huge time and worksaver, and one you simply don't see around much anymore. When you need it, though, it's absolutely fantastic. It's basically a slide hammer with movable jaws. Position the jaws around the nail head and move the heavy sliding handle down briskly. The jaws dig around the nail head, and you can lever back on the 16" long handle to remove long nails quickly. It's for rough, quick work, so some crushing of the wood around the nail head is inevitable. Weighs 5 lbs.
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