Name: French Curve Ruler / Technical Curve Ruler
 Material: Orange clear plastic (or can be transparent/other color) 
Uses: Draws non-concentric or complex curves. Very useful for technical drawing or clothing design (e.g. collars, sleeves). 
Quantity: Set of 3, each with a different curved shape to accommodate a variety of curves.
 Details: This is a set of French curve rulers , often used in engineering design, industrial arts, architecture, fashion design, and other fields that require drawing smooth and precise curves that cannot be done with a compass or bare hands.