I have seen people refer to the "Erling brick" or "headlight brick" on LEGO forums. What kind of brick are they talking about?

  • 2
    What i want to know is why is the stud inset in the brick?
    – J. Walker
    Commented Feb 7, 2013 at 16:22

2 Answers 2


I definitely know them as the headlight brick, and they look like this:

headlight brick geometry

HoMa's world of bricks has a nice page dedicated to this brick!


LEGO's Pick a Brick lists this as an "Angular Brick 1x1", Design ID 4070 (equivalent to the piece/part id).


enter image description here

The Erling Brick: named by the LEGO Designer Erling Dideriksen, who invented this element in 1979.

  • 6
    The model shops refer to this brick as a "washing machine" brick :-)
    – KevinS
    Commented Nov 16, 2012 at 6:01

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