The Mounting Post Ground Socket (MPS) from Nature House allows you to move your entire pole easily whenever you choose.  For best results, cement the socket in the ground where you wish to place your martin house and then drop in your pole and secure in place.  This ground socket can be used with any pole with a 2" inch or less (outside diameter). 

Dimensions: 2" dia. x 30"L
Shipping Weight: 4 lbs