Kent Triangular Scale Rulers are professional quality triangular scales with 6 sides and 12 sets of ratios. The three models cover most professional and student needs.
Kent Scale Rulers Triangular ratios included:
- #402 – 1 ;100, 20, 250, 300, 400, 500.
- #403 – 1:20, 25, 50, 75, 100, 125.
- #409 – 1 ;25, 5, 10, 20, 50, 100.