Each piece of wood is inspected before making the guitar.
No damage, No wormhole, dry enough, it must be sure that each piece of wood is good enough before putting into production.
For the strings(no rusty, correct gauge, good handfeeling), machine head(No rusty, easy to be tuned), strap nail(No rusty), we usually order them from the suppliers.
Those materials are also checked before putting into the guitar production line.
Gz Hansi Musical Instruments Co., Limited has strict quality control on the materials. This is important to ensure good quality guitars.