Mortar Raking Dust Guard For 115mm and 125mm Grinder Perfect power tool accessory for all repointing, mortar raking and chasing applications. This routing dust guard is suitable for most popular 115mm and 125mm angle grinders and the plate will fit directly on to a 50mm machine collar or with the relevant adaptor fitted either 45, 43, 42.5 & 41mm variants. Perfect power tool accessory - For all repointing, mortar raking and chasing applications.- This guard has been designed for dust removal while routing only.