I actually made some out of a crepe myrtle tree that my son wanted cut down. I took the trunk and cut about 1" cookies. Sanded them, let them dry and used them to get my Canare cables off the carpet. Did they make a difference? I have no idea, but my family and friends are impressed with my handiness, creativity and frugality.
The natural notches in the woof hold the cables. BTW I drive Harbeth 30.1 speakers with a Luxman L-505 Uxii integrated amp. Not much compared to what many of you run, but they are a good match for my room, my ears, my music and my budget.