The 1/8 Csk Alum/Steel Rivet max. 4.8mm is engineered for precision and durability, constructed from Aluminium & Steel, featuring a 3.2mm (1/8) diameter with a polished finish, with countersunk head style, requiring a 3.3mm hole, accommodating a grip range of 3.2-4.8mm, measuring 8.4mm in length.