Measure your model's height and length just like the LEGO Master Builders with this professional LEGO ruler! Whether you're building with bricks or Technic axles and beams, this handy tool has all the measurements you'll need to build it right. A must-have tool for any LEGO designer!
It's handy if you are not sure what the lenght some thing is. It mesures four things in the inside is for lenghts of technic axles. The short side is for the hight of bricks up to a ten count. The middle lenght of the triangle is to count the number studs up to a 20 count. And the long side of the triangle is for rounded technic beames it goes to a 15 count.
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