DUDE is the perfect spacing guide! Dude works well with rulers, helping achieve perfect seam sizes when pressing, spacing, marking and a whole bunch more!!
You will see that there is spacing assistance in 1/8", 1/4", 1/2", 3/4" and 1".
Dude is made by Silly Moon, using aircraft grade aluminum and has been anodized (a colour that is embedded in the aluminum by chemical process) , and is available in a variety of colours! (colours may be slightly different than in photo).