Black Diamond - The Black Diamond darts have been developed using ground-breaking Diamond Fusion Technology (with an unrivaled Vickers Hardness Value of 10,000) coupled with our latest class-leading Onyx Coating. Over 50,000 high grade 120 micron diamonds are fused to the tungsten matrix of the barrel, and are finished in our stunning black Onyx Coating providing an unsurpassed non-slip grip. The revolutionary grip, infused from the world’s hardest mineral, provides ultimate consistency and the perfect balance, and these 90% tungsten darts are amongst the highest specification darts on the planet! Each set is supplied with a branded rubber-compound cleaning tool to revitalise your grip when it matters.