How to use: First, open the cuffs using the key or the quick - release button. Then gently place them around your wrists or ankles and lock them. Remember to adjust them to a comfortable tightness. Safety first: Always keep the key in a safe and accessible place. If you lose the key, you can use the quick - release button. Never leave the cuffs on for an extended period to avoid circulation problems. Maintenance: After each use, wipe the cuffs with a clean, dry cloth. Keep them in a cool, dry place to prevent rust and damage. With proper care, these cuffs will last you a long time and keep adding excitement to your play.