Features and Benefits: * 1/4" shank, .014" wire size, 4500 Max RPM * Designed for use in restricted or hard-to-reach areas * Excellent for deburring, blending and cleaning of surfaces * Small diameter brush is especially designed for use on portable air and electric tools Applications include deburring, blending, removal of rust, cleaning. End brushes are great for cylinder heads, pistons and valve ports, rubber and plastic flash removal, removal of rust, paint scale, tool polishing, and weld cleaning.