The HWKS-100 is a special hardware kit designed for some of the Sony W series TVs. With this hardware kit, you can install your Sony TV on most universal full motion TV brackets.
It contains:

2 pcsM5x50 bolts
2 pcsM6x55 bolts
4 pcsSquare spacers
4 pcsWashers (L=20MM)
Note: TV mount not included