Go to the hardware store and get some carriage bolts & nuts. Carriage bolts have a round head and will not damage the floor. For extra floor protection, add some felt to the bolt head.
Vandersteen 3a sound anchor
I am the proud owner of a used pair of Vandies 3a signatures. I got them for an amazing price at 1000 dollars with music wave ultra xl cables. The only question I have is I have wood floors. The sound anchors that came with them made the speakers unstable on the flooring. I took them off but how am I supposed to use them? I did not see any directions on how to use them in the manual and there did seem any obvious way to set them up properly. A huge thanks for anyone that can help. BTW I would call my local dealer here in Utah, but I had planned on buying a pair of 2ce sigs from him and I feel rather embarrassed for backing out of the deal (I couldn't live with my self if I passed up this deal).