Floor protection from spikes

Be careful using coins for such heavy speakers on hardwood. I use to own speakers that were about 150 pounds each and set the spikes on US pennies. When I moved I noticed I had penny size Abe Lincoln impressions on my hardwood floor.

Herbie's sells nice gliders for using under spikes.
Cheep too.
I would be wary of sorbothane as it might stain wood surfaces.
Another alternative is to get either butcher block or marble plinths made.
I know Richard Vandersteen swears by marble under his speakers.
B

I use Vibrapods under my Heresy IIIs, and did under my previous SIlverline Preludes also (the Preludes sat on maple butcher blocks).  I put stick-on felt pads under the "pods" so they can't mar the floor and I can micro move the Heresies or simply push them around when they get out of line.

Great advice; thx. Where do I get gliders?
These are Acapella La Campanella 2 horn speakers. Not getting any spousal love as they are damaging the floors.

Not the cheapest option but I use Linn Skeets...