Product details: - Durable and flexible nylon adapters designed specifically for CORE and JETSTREAM crossbar shapes

- Allows most RoundBar style mounts to attach in minutes
- Tool free installation
- Sold as a set of 4
- Compatible with HighRoller, Raptor, WheelFork, HullyRollers, Mako Saddles, KayakStacker, Multimount, Accessory Lock Housing, and Basketcase