Spikes made of metal turned from billet, they are perfect for decoupling speakers with M8 threads. Thanks to fine workmanship, these spikes offer a sharp point that can best facilitate mating with the included sub-point, which is also turned from solid. Completing the kit is a self-adhesive EVA felt pad to be placed at the base of the underpins in order to preserve the supporting furniture or floor. M8 threading Adjustable ferrule Size: 60.5 x 25 mm (Undercut tip) Weight: 80 grams each Package contents: 4 Pcs. Spike including ring nut for height adjustment, 4 Pcs. Underscores, 4 Pcs. EVA Felts