Chalk lines are commonly used for marking long, straight lines on relatively flat surfaces that are much longer than is practical by hand or with a straight edge.
On the end of the chalk powdered string is a metal hook which can be attached to an object at one end and then reeled out across the surface and pulled tautly. Once the chalk string line is in the correct position it can be plucked at its centre and the tension in the string will make it snap back down and create a chalk line on the surface of your object.
The Internet Electrical range of chalk line tools and re-sealable chalk bottles offer professional standard, heavy duty chalking products, built for everyday use.
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DRAPER CHALK LINES