parametric pole mount bird spikes

http://www.sodnpoo.com/posts.xml/parametric_pole_mount_bird_spikes.xml

pole_dia - diameter of the pole
pole_thick - thickness around the pole (3mm)
pole_h - height of the pole clip (10mm)
spike_l - spike length (60mm)
spike_h - spike height (2mm)
spike_w - spike width (3mm)