Features: JET knot banded wire cup brushes are similar to a regular knot style cup brush but have the added feature of a band or knock-off ring. This ring helps to eliminate brush flare out, keeping brush tips in contact with the workpiece for a more aggressive brushing action As the exposed brush wears down to the ring, it is easily knocked off to expose the balance of the wire for increased brush life An excellent safety and performance aid, the band helps to reduce wire breakage caused by flare out * 553607 and 553606 Feature exclusive larger diameter high density knot twisted brushes for 5" and 6" grinders - The industry's most productive brushes for this grinder range Specifications: Product # Diameter Arbor Hole Max Speed Wire Diameter 553605 2-3/4" 5/8"-11NC 12,500 RPM 0.020" 553606 3-1/2" 5/8"-11NC 11,000 RPM 0.020" 553607 3" 5/8"-11NC 11,000 RPM 0.020" 553652 4" 5/8"-11NC 8,500 RPM 0.020" 553655 5" 5/8"-11NC 6,500 RPM 0.020" * All Pictures Shown Are For Illustration Purpose Only. Actual Product May Vary Due To Product Enhancement.