Black & Decker™ Lock Button is designed for type 1 26438 7", 27724 5" angle grinders, type 1 27328 large angle grinder, type 1 27704 7" right angle grinder and DeWalt® type 1 DW630 7" medium angle sander, type 2 DW840 7", type 1 DW840 7", type 2 DW831, type 3 DW831, type 4 DW831 angle grinders.