This heavy-duty chalk box features 150' of line. The sturdy line features a pull ring to easily extract the string from the box then can be placed over a name to snap the line. The durable plastic container hold over a pound of chalk for fewer refills. Use any color of chalk to fill the container, sold separately. A solid single piece steel rewinder helps ensure a long life to this tool. The bright orange color is easy to spot on the job site.