Yes, for fixing to solid surface materials use M4 ‘Squirrel’ inserts (, or M4 Rampa BAN/BAV inserts ( to attach Type 1 or Type 2 Fixes: (use with suitable washers when using pan head screws). The buttons ideally require M5 CSK screws for maximum strength; use M5 Rampa BAN/BAV inserts. For reduced loadings, the Buttons may also be fixed using M4 CSK screws.