20pcs M10 Rivet Nuts with Hand Nut Tool Set, Manual Rivnut M10, Black. 【Sizes】Include 1 Mandrel (M10) Rivet Nut Tool, 20 Nuts. 【Usage】 Fix The Hexagon Rivet Head With A Wrench And Turn The Screw (Driven By Hand Or Electric Drill) To Achieve The Function Of Riveting The Rivet Nut.