noun
General Slang
Single jack
· noun · construction
A short-handled sledgehammer swung one-handed, usually around 3–4 lb.
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Definitions
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A short-handled sledge — typically 2 to 4 pounds — designed to be swung one-handed while the other hand holds a chisel, star drill, or spike. Originates in hardrock mining where a single jack miner drilled holes solo. Still standard in masonry, demo, and anywhere you need controlled heavy hits.
“Grab the single jack and that cold chisel, we're popping these tiles.”
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Single jack In A Sentence
Grab the single jack and that cold chisel, we're popping these tiles.
Origin & Usage
From 19th-century American hardrock mining: a 'single jacker' worked alone, holding the drill steel in one hand and swinging a short sledge with the other. 'Double jacking' was a two-man team.
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