The 5/32 Csk Alum/Steel Sealed Rivet max. 8.0mm is built to exacting standards, constructed from Aluminium & Steel, featuring a 4.0mm (5/32) diameter with a polished finish, with countersunk head style, requiring a 4.1mm hole, accommodating a grip range of 6.4-8.0mm, measuring 13.5mm in length.