HSN Code 9017 refers to "Drawing, marking-out or mathematical calculating instruments, e.g. drafting machines, pantographs, protractors, drawing sets, slide rules, disc calculators; instruments for measuring length, for use in the hand, e.g. measuring rods and tapes, micrometres, callipers and other gauges, not elsewhere specified in chapter 90." This classification code is essential for identifying measuring and drawing instruments for import/export purposes based on their nature, composition, and intended use. Common products under HSN Code 9017 include drafting machines, protractors, measuring tapes, micrometres, and callipers. Additionally, the GST rate for these instruments under this code supports accurate trade compliance.