If traveler controls are not used, you can help prevent shock-loading your rig when tacking by using a pair of #3213 Pinstops on low-beam track (with drilled pinstop holes), to localize the traveler position.
The shackle can serve as an attachment point for a block in emergencies. When used on genoa track, the shackle can be used to attach a genoa lead car, or as a inhaul/barber haul attachment point.
Use with R32, 3159, and 3155 Series (with pinstop holes) Low-Beam Big Boat CB Traveler Track.
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm.
www.P65Warnings.ca.gov