Shank Material: High Speed Steel. Shank: 1/4"(6.35mm). Radius: 1/8 5/32 3/16 1/4 5/16 3/8 1/2. 3pcs 54.8mm HSS Wood Circular Saw Mini Disc Blades Drill Tool Set with Mandrel. High Speed Steel Body. Cutting sharp, smooth rotation, brisk operation.
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