A choice of triangular scale rules made by Linex of Denmark. Each rule has six divisions, is precision divided, made from tough matt white dunirit and supplied in a tough protective case.
Each rule is 300mm long. The divisions are as follows:
Rule 311: 1:1:20:25:50:75:125
Rule 312: 1:100:200:250:300:400:500
Rule 313: 1:2.5:5:10:20:50:100
Rule 314: 1:500:1000:1250:1500:2000:
2500
Rule 315: 1:20:25:33 1/3:50:75:100