Includes: 12 sets of our fence nails, each 3.5 cm, total length 4.2 meters, can cover a large area. Advantages: each nail pigeon fence is 3.5cm long, which is longer than others on the market, each 42cm. Deterrence: Upgraded fence spikes are more deterrent to birds/cats/ pigeons/raccoons and allow your property. Application: Made of high strength polypropylene plastic, UV and frost resistant, suitable for fences, walls and window sills. Warm reminder: warm reminder, please keep away from children, if you have any questions, please contact us, we will always serve you.