Some concepts are embarrassingly obvious once you see them in practice. So it is with the Flat-Bob.
The most common use of plumb bobs is next to a wall, yet round plumb bobs roll around endlessly, making it nearly impossible to get an accurate line. The Flat-Bob doesn't roll and, because it has a very low center of gravity, it stabilizes rapidly. Because it is thin, the point is easily visible from above, again not the case with a regular bob. The body design also makes accurate marking much easier. You can press it against the wall as you mark a line dead center through the body slot.
The Flat-Bob comes with a small windlass that holds the 8' of braided nylon cord (no endless twirling, like twist cord!) and makes it easy to adjust the cord to any length as well as have it hang exactly plumb from a nail. Finally, the cord windlass snaps into the body slot to keep the cord from unwinding or tangling. Actually, that is not quite all; there is also a tip cover to protect the point when the Flat-Bob is in a toolbox.
Whether you use this in construction, for plumbing cabinetry or for wallpaper jobs, it can easily pay for itself the first day.
All brass fittings on a precision-molded nylon body. 3-3/4" long overall.
Patented. Made in Canada.