Medicus Core Links Designed to help you Stop hooking & slicing  and start creating the proper alignments in your golf stroke fast and stop dreaded "chicken winging" forever! Easy to Use - Simply clip the Retraction Reel to the front of your belt, place the CoreLinks arm pads under each arm and swing. Instant Feedback - Arm pads will quickly release whenever you fail to maintain the proper geometry, allowing you to quickly gain a solid feel for how your arms should rotate around your core. All CoreLinks come in one size that fits all. Available with Black or Red Retraction Reels.