Dewalt 144960-00 Sander On/Off Switch Genuine Original Equipment Manufacturer (OEM) Part This part is compatible with models including; 4011,DW412,DW411,D411-04,900116700,RO100 TYPE 2,D421-04,DW420,900116780,900277080,DW423 TYPE 1,DW420 TYPE 1,DW421 TYPE 1,900277070,DW421,DW422,D420-4,DW422 TYPE1,D412-04,D421-04 TYPE 1,D26441 TYPE 1,7448 TYPE 5,900112670,D26451 TYPE 1,D420-04 TYPE 1,D26453 TYPE 1,900116670 This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including; 910774-00 Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Dewalt,Craftsman,Black & Decker This on/off switch (part number 144960-00) is for sanders Unplug the sander before installing this part