PFERD stem mounted flared cup power knot end brush for heavy-duty and severe applications, recessed areas and corners such as weld and mold cleaning. Flared cup style provides best performance and longest brush life. Carbon steel bristles. Suitable drive systems: straight grinders, flexible shafts. The power source should preferably be of a variable-speed type to control fill expansion. Industrial-grade brushes recommended for use on high-speed power tools such as flexible shaft machines, straight grinders, and power drills. Uniform filament composition and density provides optimal balance and finish. Uses in industries area: automotive, transportation, mining, electronics, aerospace, welding, nuclear, textiles, food services, construction, petrochemical, farming, medical, shipbuilding, fabricating, defense, foundries and plastics.