2580-3529 Features: -For general purpose wet/dry cutting in stone and masonry.-For longer lasting cutting in masonry-type materials.-Specially designed for cordless saws to permit more cuts per charge.-Ultra thin kerf design for lighter cutting load plus saves material.-Individually hand-hammered by skilled saw technicians for guaranteed flatness and proper tension to make the perfect cut.-15 mm arbor.-2,240 maximum RPM.-3-3/8'' blade.-Carded. Dimensions: -4'' Disc grinder (2561-5022).