Upgraded Bird Spikes: Adding small spikes beside long spikes makes birds unable to stand in the gaps of the bird spikes effectivelyCutting/Trimming: Each bird spikes can be divided into the size you want according to your needs,Easy to install in various narrow placesWeather Resistant: Made of high quality acrylic plastic, the bird deterrent spikes won't rust and can be used for a long timeFlexible Installation: Use nails/screws, double sided tape and strong zip ties to fix the animals spikes on any flat surfaceHumanized: Plastic spikes will give animals and people a warning to keep them away and actually not hurt themTotal Length: 14 pack in a box, 1 pack includes 3 small parts, 1 small part about 4 inch.Upgraded Version: The practical design of long spikes and short spikes makes birds nowhere to stand.Wide Range of Uses: The bird spikes can not only deter birds, squirrels raccoon pigeon cats and crow, but also prevent thieves.Humanized: Plastic materials will not cause great harm to birds, but just serves as a warning to prevent them.