Butterfly BT-660 Triangle Ruler – Mathematics Ruler Set

A complete ruler set for school needs and drawing activities.
Designed with precise measurements to make mathematics, geometry, and technical drawing tasks easier.

BT-660 Set Includes:
- 1 straight ruler (15 cm)
- 1 protractor (180°)
- 1 right triangle ruler (45°)
- 1 right triangle ruler (60°)