The Blue Spot Tools 5 PCE Nylon Abrasive Brush Set is ideal for the removal of scale, rust and paint and can also be used for de-burring and finishing. Manufactured from nylon threads which are impregnated with abrasive grit, the nylon bristles are also safer to handle than traditional wire wheels. Non-sparking. Shank: 6mm / 1/4". Maximum safe speed: 4500 RPM. Manufactured from nylon threads impregnated with abrasive grit Ideal for removal of scale, rust and paint and can also be used for de-burring and finishing Non-sparking Shank: 6mm / 1/4" Maximum safe speed: 4500 RPM PACKAGE CONTENTS 1 x 50mm Cup Brush, 1 x 24mm End Brush, 1 x 75mm Wheel Brush, 1 x 100mm Wheel Brush, 1 x 100mm Flap Brush