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The Unibit® step drill bit features as single radial concave flute design for smooth, even cutting and virtually round holes. Ideal for drilling holes in steel, copper, brass, aluminum and other thin materials.
• Drills 13 holes: 1/8" to 1/2" in 1/8" steps
• 1/4" shank
• Self-starting
• Hardened industrial grade high speed steel with super tough Titanium Nitride coating.
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