Plumb Bobs, 1¾ oz, Pkg. of 12

Product Details

Accurately measure tilt angles for inclined planes or projectile-launching devices with these inexpensive plumb bobs. Simply tie the plumb bob to a string and secure the string to the angled apparatus. Then, measure the angle between the vertically hanging string and the instrument using a protractor. Available in two sizes: ½ oz and 1¾ oz. Sold in packages of 12.