Parametric cat & bird spikes

thingiverse

Spikes to scare away cats and birds from windowsills. It's a customizable project - you can tailor size and height, number and height of spikes to suit your needs. An optional arm or holder can be mounted or placed under the pot for added stability. The uploaded STL file measures 125mm x 68mm x 15mm. You can download the SCAD file and open it in OpenSCAD. Simply adjust variables, press F5 to see changes, and F6 to render and export to STL. You can even print an animal-safe version with truncated spikes. My cat, along with my neighbor's, has never sat on my window again since I installed this spike system. Pots are no longer dropped, and side walls remain intact as they've moved to another window where they're allowed to sit.