1. Alphabet of Lines Construction lines Visible lines Thin and light
.020” (0.5mm)
Hard lead (4H)
Visible lines
Thick and dark
.028” (0.7mm)
Softer lead (F or HB)

2. Alphabet of Lines Hidden lines Thin and dark .020” (0.5mm)
Softer lead (F or HB)
.125” (3mm) long dashes w/ .030” (1mm) spaces in between
.125"
.0625"

3. Alphabet of Lines Center Lines Thin and dark .020” (3mm)
Softer lead (F or HB)
.125” (0.5mm) dash in center w/ .030” (0.1mm) spaces between longer lines
.125"
.75" - 1.5"
.0625"

4. Alphabet of Lines Dimension, Extension, Leader Lines Thin and dark
.020” (0.5mm)
Softer lead (F or HB)
6.125”