The 3/16 Alum/Steel Rivet Surfmist max. 6.4mm is engineered for precision and durability, constructed from Aluminium & Steel, featuring a 4.8mm (3/16) diameter with a polished finish, with dome head style, requiring a 4.9mm hole, accommodating a grip range of 4.8-6.4mm, measuring 11.3mm in length.