Utilizing high integrity materials like surgical grade stainless steel, with experience gleaned from half a century of industrial ball bearing manufacture, HollenWolff creates items of uncompromising quality. HollenWolff self-retaining cufflinks will only open when held “North/South.” (With the push-button facing down.) Which means they can only be operated by a man who knows which way is up. This mechanical metaphor was built into HollenWolff cufflinks for a reason. Like Excalibur and the stone, it only works for a man who has found his "True North." Each set is individually numbered via laser inscription for reasons of both warranty and history.