The ClamLock Vertical Rattle Reel brings convenience and sound-alert capability to your ice fishing setup. Designed to mount easily to any ClamLock accessory baseplate, this rattle reel keeps your line in place while letting you know when a fish is on. The rattle reel goes off as your line is pulled, providing audible feedback that helps you detect bites. This rattle reel also features a tensioning system so you can adjust the sensitivity depending on your bait size to make sure you alerted even for the light fish bites.