Drill America VAC1-5SET 5 Piece Unibit HSS Step Drill Bit Set (Sizes #1 - #5), VAC1-5SET Shop By Category > Engine > Tools>Vanos Threads Per Inch: 4

Threads Per Inch: 4

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Drill America VAC1-5SET 5 Piece Unibit HSS Step Drill Bit Set (Sizes #1 - #5), VAC1-5SET Shop By Category > Engine > Tools>Vanos Threads Per Inch: 4Drill America VAC1 5SET 5 Piece Unibit HSS Step Drill Bit Set (Sizes #1 #5), VAC1 5SET Step drills are the only drills you can sharpen yourself (both tip and flute). Exlusive single radial concave flute crates perfectly round holes in metal, plastic wood and other thin materials without center punching. Contructed of industrial grade high speed molybdenum steel, heat treated and temperature for long life. Slef stating tip. No center punching needed.