![]() Looking for other test and measurement tools? We also carry a full selection of bevel sliding, calipers, marking gauges, measuring wheels, micrometers, squares, tape measures, and more. Once you have attached your string, simply use the spirit level sighting pattern to align your bob with magnetic north then trim the head for a perfect fit. The weight, or bob, is then allowed to swing freely so that it stops precisely below the point at which the string above is fixed. 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. The point of the tool is fixed at the point to be plumbed. ![]() Plumb bobs are used to find straight vertical lines and horizontal lines. These plumb bobs are made from solid brass, meaning their rust resistant and durable. The plumb bob is used to ensure that the chain is perfectly vertical or plumb when taking measurements. With their vertical, solid brass construction and through a hole, these 300g/400g/450g heavy-duty brass plumb bobs (usually used in electrical work) give you a reliable point to start from. A plumb bob is simply a weighted material with a central point that is suspended and gives a precise vertical location. The plumb bob is a tool used by surveyors in chain surveying, which is a method of land survey that involves the use of a physical chain or tape measure to measure both distance and angles. The plumb consists of a specially designed weight and coarse string made of twisted cotton or nylon threads. Thus, the builder can ensure that the structure he is constructing is erected perfectly true and the painter can use it as a reference. A plumb bob, typically a pointed lead weight, is suspended from a string and gravity then makes the string hang perfectly straight. Plumb is the vertical equivalent of a spirit level. Operation Plumbbob was a series of nuclear tests that were conducted between May 28 and October 7, 1957, at the Nevada Test Site, following Project 57, and preceding Project 58/58A. A plumb line is a tool used by builders and painters to find the true vertical. To ensure that the frame of the wall is perfectly vertical from the ceiling to the floor, a plumb bob can be. If a room is being split into two or more parts, walls have to be built. Plumb bobs are used by masons, carpenters, and electricians to find a vertical line known as a "plumb" in the ground. Using a plumb bob and marking several plumb lines across the length of a wall will ensure that wallpaper is totally vertical and even.
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