3 Links of G4 Stainless Steel Chain

3 links of G4 Stainless Steel DIN766 Chain cut from our stock sourced from William Hackett in the UK

The 3 links make the connection between the anchor end of the swivel and the shackle attached to the anchor.
The smaller end of the swivel connector is connected to the anchor chain.

This system is most commonly used with the Kong swivel anchor connector

For KGAC08-S:   6-8mm connector (BRS-77.318.106) - use 3 links of 10mm chain
For KGAC10-S: 8-12mm connector (BRS-77.318.108) - use 3 links of 12mm chain

The picture below shows the correct configuration with one bow shackle and 3 links of connecting chain:

If the hole/cut-out in the anchor shank has sharp edges and will not accept the crown of the bow shackle in a proper load bearing manner, it may be pertinent to fit two shackles back to back.
The picture below shows this optional configuration with an extra D shackle:

Anchoring Shackles