Spacing By Use Of Scriber () And Rule. Points and lines made with a pencil, while accurate enough for many purposes, are too inexact to define the proportions of different parts of a joint. Where good fitting of any kind is required, the pencil should not be used, but all points and lines be made with a scriber. The scriber should be sharp, and should make a clearly-defined cut, not a dent.

Using the rule, then, to determine the distances, substitute the scriber for the pencil, and, following the dimensions given (Face D, Fig. 137), lay off points along the length of the work through which the lines ab, cd, etc., are to be drawn.