When using a Halcyon Cinch Harness Kit, a Halcyon Cinch Bolt Extender is sometimes needed if your twinset bolts are not long enough to accommodate the cinch adapter plate.
In most cases, the lower bolt of your double tanks will be of sufficient length to allow this slight offset. However, the Halcyon Cinch Bolt Extender allows divers to extend a short lower bolt where necessary.
The bolt extender threads directly to the lower bolt of a double tank configuration; it uses an inset Allen key fitting so it can be easily tightened in place.
Cinch Bolt Extenders are available in metric and imperial.