Cast aluminium scale rule with triangular body for safer cutting and 
scoring of materials. Clearly marked metric graduations. 6 scales allow 
precision drawing for architects, engineers and  carpenters. Concave 
base reduces smearing when drawing. Scales 1:20, 1:25, 1:50, 1:75, 
1:100, 1:125. 
Features:
- Aluminium scale rule
 - Triangular body 
 - Safe for cutting & scoring materials
 - Marked metric graduations
 - 6 scales
 - Length 300mm
 - Scales:
 - 1:20
 - 1:25
 - 1:50
 - 1:75
 - 1:100
 - 1:125