plastic provides the holder with long service life. Used for Electric Drill and Electric Hammer. Perfect Match: The carbon motor brush is applicable to RS550, the carbon brush with holder assembly ensures perfect matching and stable working. Broad Utility: The motor brush can be widely applied to driver, electric drill, electric screwdriver and many other tools, very useful. Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. The Compatibility Is Just For Please Compare The Part Number With Your One Before Purchasing! Colour:Photo Color Material:plastic Package Contents: 10pc Carbon Brush Holder Motor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.