Rule one is a helpful aid to 7mm scale modellers, by TS Design.

Features:

1:1 scale rule (mm)

1:43.5 scale rule (feet)

Centre finder up to 49mm off-centre

Wire/Rod diameter quick-checker (3/16”, 5/32”, 1/8”, 3mm, 2mm, 1.5mm, 1mm, 0.7mm, 0.45mm)

O gauge back-to-back checker

Average person height (1:43.5 scale)

Platform height

Average buffer centre height

Standard buffer spacing width

All in one pocket-sized package!