The Prowler RED Mechanic ring is a cock ring that will keep you harder for longer. It is made of medical grade silicone, so it is safe to use with water-based lubes. It has a thick and squishy nut-shaped desigb that will hit the spot just right, while the rest of the ring will ensure you stay hard. The Prowler RED Mechanic is flexible, so it will fit a variety of sizes.