Rut Grenade Concentrated Shark Repellent Concentrated Shark Repellent . Repel Sharks while Scuba diving, Surfing, Fishing, Spearfishing, Kayaking and general ocean water activities. Rut Grenades Shark Repellent has the potential to save lives and avoid would be shark attacks. Avoid Shark contact and mistaken identity Easy attach on your Life Vest , Swimsuit or Scuba Gear. Drag it from your Kayak Repel Sharks while Scuba diving, Surfing, Fishing, Spearfishing, Kayaking and general ocean water activities. Avoid Shark contact and mistaken identity Empty contents into area you want to repel sharks Professional Grade / Laboratory / Industrial Grade