【Material】: Annular Cutter Set are Made of Heat-treated High Speed Steel (HSS),which are Corrosion-resistant and Ensure Excellent Durability, Sharpness, and can Reduce Friction for Smoother Running. 【Function】: Weldon Shank Mag Drill Bits can be used not only for Machine Tools such as Milling Machines，for a Wide Range of Materials, such as Cast Iron, Stainless Steel, Steel Materials, Copper, and Aluminum.
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