Black square Masonic cufflinks. The symbol set square and compass design featured in these bold black square Masonic cufflinks is universally recognized as a symbol of Freemasonry. The set square and compass are both architect's tools, and typically represent good judgment discernment. The set square and compass are both architect's tools, and typically represent good judgment discernment. Wear these stylish black square Masonic cufflinks for a touch of stylish sophistication that is perfectly suited for business meetings and general office wear.