What are the 4 classification of sewing tools?
Hem Marker
Ruler
Seam gauge
Tape Measure
Answer two:
Sewing tools are generally classified by the task they are
designed for. You will start your project with the marking and
measuring tools, next the cutting tools, now the sewing tools, and
finally the finishing tools.
So the four categories are marking/measuring; cutting; sewing;
finishing
For more information see this source:
http://msucares.com/pubs/publications/p1302.htm