Irwin 11/16 In. Black Oxide Silver & Deming Drill Bit Self-Drilling Sheet Metal Screws Cuts pipe sizes 1/2-Inch to

Cuts pipe sizes 1/2-Inch to 1-1/2-Inch

Craftmaster (prior to 1991)

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Irwin 11/16 In. Black Oxide Silver & Deming Drill Bit Self-Drilling Sheet Metal Screws Cuts pipe sizes 1/2-Inch to135 deg. split point for no slip starting on hard materials. Parabolic flute design for improved heat dissipation and increased life. Industrial M7 grade steel for high performance drilling in metal, wood, and plastic. Black oxide coated for longer life and greater resistance to wear. Jobbers length. For drilling through metal, wood, fiberglass, stainless steel.