Features: Waved steel core, specially used in professional cutting, Fast and smooth cutting of large range of medium to hard stone materials, including concrete ItemNo. Outer Diameter Seg. Width Seg. Height Arbor Inch Metric YJH7105 4" 105 2.2mm 8mm 7/8", 20mm YJH7115 4.5" 115 2.2mm 8mm 7/8", 20mm YJH7125 5" 125 2.2mm 8mm 7/8", 20mm YJH7150 6" 150 2.3mm 8mm 7/8", 20mm YJH7180 7" 180 2.6mm 8mm 7/8", DM YJH7200 8" 200 2.6mm 8mm 7/8", DM YJH7230 9" 230 2.8mm 8mm 7/8", DM YJH7250 10" 250 2.8mm 8mm 7/8", DM