Spike + Rotator (S-01) Used on packed or snowy soil. (A heavy hammer is needed for driving the spike.) Image: 
Spike + Rotator (S-02) Used on packed, snowy or sandy soil. (Pressed into the ground with foot pressure.)
Image: 
Metal Screw Spike + Metal Rotator (MD-03)
Used on packed, snowy and sandy soil.
Image: 
Metal Screw Spike + Metal Rotator + Spring (MD-04)
Used on packed, snowy or sandy soil. The spring bends the pole during strong gusts of wind.
Image: 
