Tungsten Carbide 8mm Men's Celtic Knot Comfort Fit Wedding Band Ring 8mm Men's Celtic Knot Tungsten Carbide Comfort Fit Wedding Band Ring The Celtic Knots are still Infinity Knots but used as a Symbol of Love. Virtually Indestructible and Scratch Proof Comfort Fit & Hypoallergenic Beware Of Replicas - 30 Day Money Back Guarantee