This is a scribing tool that scribes two parallel lines in one stroke.
The set includes 4 complete scribers (4 blades and 4 holders).
The blades can scribe parallel lines with the following distance between lines: 0.33mm (~0.01 in) , 0.5mm (~0.02 in), 0.75mm (~0.03 in) and 1mm.(0.04 in).
The back of each holder can also be used as a scribing saw like Scribe-R (RB-T019)