Our 3M? Stikit? gold disc roll 236U features a tear-off disc format in a single roll, making them exceptionally fast and easy-to-use. Aluminum oxide mineral abrasive delivers an aggressive cut. Anti-loading coating and available seven-hole pattern help clear dust from the disc surface for longer life. Stikit? adhesive attachment makes changing the discs quick and easy.3M Stikit 236U PSA disc roll uses aluminum oxide as the abrasive material and has a diameter of 6 in. 3M incorporates this aluminum oxide material into the PSA disc roll forming a grit of P120.