Simpson 7/8 in. x 21 in. SDS-Max Quad-Head Carbide Drill Bit MDMX08721Q Metal Screws What material and finish does

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Simpson 7/8 in. x 21 in. SDS-Max Quad-Head Carbide Drill Bit MDMX08721Q Metal Screws What material and finish doesKey Features Uniformly Brazed Carbide Inserts: Uniformly brazed carbide inserts resulting in longer bit life. Self Centering Tips: Self centering tips for accurate hole placement. Chromium Nickel Molybdenum Steel Alloy Body: Chromium nickel molybdenum steel alloy body ensures hammering quality and extended service life. Heat Treatment & Shot Peened Finish: Heat treatment procedures and shot peened finish increase surface hardness, drilling speed,