Three sides with six different scales feature die-engraved graduations.
Staedtler Engineering Triangular Scale, 98718-34BK, 12"L, White, Polystyrene Easy-to-read printed graduations will not rub off.Staedtler engineering triangular scale, 98718-34bk, 12"l, white, polystyrene 12" triangular scale in staedtler's professional series is ideal for engineers.. Engineer triangular scale is fully divided: 10, 20, 30, 40, 50, 60 parts to the inch.