Sunrise Plumb Bob plummet I Hulog High Quality 1pcs

-👍100g/150g/200g/250g/300g/400g/500g.

-👍good quality product

-👍good Price

-👍one of the quickest and easiest ways to plumb up or down any given point is w/ a plumb bob.

👍A plumb bob, or plummet, is a weight, usually with a pointed tip on the bottom, suspended from a string and used as a vertical reference line, or plumb-line. It is

👍Until the modern age, plumb-bobs were used on most tall structures to provide vertical datum lines for the building measurements.

👍A section of the scaffolding would hold a plumb line, which was centered over a datum mark on the floor.

👍As the building proceeded upward, the plumb line would also be taken higher, still centered on the datum.

👍Many cathedral spires, domes and towers still have brass datum marks inlaid into their floors, which signify the center of the structure above.