Low carbon steel

High carbon steel

Medium carbon steel

Mild steel

Wing nut

Round nut

Slotted nut

Domed cap nut

For scribing arcs and circles

For marking lines parallel to inside and outside edges

For measuring the internal dimensions

For measuring the external dimensions

To measure external measurement

To transfer measurement from steel rule

To measure internal measurement

To mark lines

22 Degree

32 Degree

34.5 Degree

39.5 Degree