Milwaukee wire cup brushes are offered in a full range of crimped and knotted wire styles. All are built with Hyperwire construction for faster material removal and greater life. Their precision construction reduces vibration and their improved design reduces wire fatigue. Crimped wire works best for lighter duty surface cleaning as it is less rigid than knotted wire and can get into crevices more easily. Milwaukee wire cup brushes are designed for use with 9 in. Milwaukee and competitive grinders with 5/8 in.11 threaded spindles.