A chalk box is a chalk-filled container, housing a retractable string, used to mark long, straight lines for cutting or alignment. A chalk box can also be used as a plumb bob which determines when an object is perfectly vertical.
A chalk box is a chalk-filled container, housing a retractable string, used to mark long, straight lines for cutting or alignment. A chalk box can also be used as a plumb bob which determines when an object is perfectly vertical.
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