These Pest-Stop Professional Bird Spikes can be fixed to window sills, ledges, guttering and walls etc. They are excellent at discouraging birds and can prevent birds from landing. Supplied in handy 50cm strips, the Bird Spikes are easy to fit and highly effective. The tough steel spikes are fitted on a strong but flexible plastic base which is easy to cut to required size and easy to fix with screws or glue. Supplied in a pack of 10. PRCPSPBS10