Dophee 44mm HSS Sawtooth Saw Blade Cutting Disc With 3.17mm Mandrel Shank Rotary Power Kit Great for cutting, sawing and carving of hard materials. Designed to be long lasting and not lose its shape or break, it provides smooth, fine cuts. Ideal for working with hard material, .Also works on marble, concrete, brick, porcelain, ceramics, hard epoxy and soft and hard wood. Material: HSS High Speed Steel. Diameter: 44mm/1.73". Inner Hole: 6.35mm/0.25". Thickness: 0.8mm/0.03". Connecting rod diameter: 3.175mm/0.13".