Karen Lin

Straight Line Ruler - This is a rule for those who are worry about how to write a straight line parallel to the horizontal in a plain paper.There are tow scales in this ruler to make you work quicky. Both of the red metal strip can move freely with the track.To make the users find the horizontalin easier,the short one not only to alignment of scale axis,but also to shape into a right-angle whit the long metal strip.You just need to move the both sides of the long red one to find the needed position breezily.

• 3D Modeling