A pair of 3D Yellow Builders Hard Hat Cufflinks in 3D, with swivel clasp. Dimensions 15mm x 18.5mm. The Bob the Builder yellow hard hat. The Hard Hat or Safety Helmet is worn by anyone working on a construction site, health and safety comes first. Make your boring shirt standout with these hard hat cufflinks. A great idea for a gift/present or treat yourself - Project Managers, Architects, Joiners, Bricklayers, Roofers. - Great idea for promotional gift or event. Dimensions 1cm in diameter.