When A Gentler Touch Is Needed, This Nylon Cup Brush May Be Just What You Should Use. This Brush Can Gently Clear Away Dust, Wood And Metal Debis Without Scratching Your Surfaces. * Includes 3 Packs Of 2 Piece Set * Length of Bristles : 5/8" * Pre Mounted * Overall Length: 1.5"; Dia 1/8" * Compatible With Rotary Tools