Description :
Clear Metric Parallel Multi-purpose Drawing Rolling Ruler
Multi-function --- Can be use as a compass， horizontal ruler， straightedge， protractor， circle template and angle template Practicability --- Combination Rolling Rulers， Ideal for drawing vertical lines， parallel lines， charts， graphs， circles， 3-D drawings etc... Affordable --- Ideal for students， artists， and designers
Specifications :
Material : PlasticDimension(Approx) : 308mm x 60mm x 27mm(L x W x H)Measurement Range : 30cm， 12 InchMain Color : Clear
Package included :
1 x Parallel Multi-purpose Drawing Rolling Ruler
Details pictures :