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![]() | Irwin Silver & Demming Drill Bit
Irwin 91164 - 1"" Slvr/Demming Bit, For use in 1/2"" drills. 1/2"" reduced shank with 3 flats for secure grip. 6"" overall length. 118 point. M7 ... Read More
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![]() | Irwin Silver & Demming Drill Bit
Irwin 91156 - 7/8"" Slvr/Demming Bit, For use in 1/2"" drills. 1/2"" reduced shank with 3 flats for secure grip. 6"" overall length. 118 point ... Read More
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![]() | Irwin Silver & Demming Drill Bit
Irwin 91148 - 3/4"" Slvr/Demming Bit, For use in 1/2"" drills. 1/2"" reduced shank with 3 flats for secure grip. 6"" overall length. 118 point ... Read More
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( 1 reviews )




Posted: Nov 2 2007
IRWIN Silver &Deming Drill Bit -3/4"
I bought this bit in hopes of it not dulling like the Hitachi comparison did, but it dulled on me after drilling 2 holes in 1/2" steel. I believe it dulled because I was not using it properly though. I have a 1/2' hand drill and when you move it slightly to reposition, you drill the hole at a slightly differenet angle causing the tips on the outside of the drill bit to round off, causing the bit to not work well or to not work at all. Unless you are drilling in wood, I would suggest putting this drill bit in a press, rather than using it on a hand drill. Over all, the product is good and it probally dulled like the other from the improper use.
![]() | Irwin Silver & Demming Drill Bit
Irwin 91144 - 11/16"" Slvr/Demming Bit, For use in 1/2"" drills. 1/2"" reduced shank with 3 flats for secure grip. 6"" overall length. 118 point ... Read More
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![]() | Irwin Silver & Demming Drill Bit
Irwin 91136 - 9/16"" Slvr/Demming Bit, For use in 1/2"" drills. 1/2"" reduced shank with 3 flats for secure grip. 6"" overall length. 118 point ... Read More
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![]() | 31/64" Reduced Shank Drill Bits
Reduced Shank Drill Bits - REDUCED SHANK DRILL BITS. HSS fractional 3/8" reduced shank drill bits. For general use in metal, wood and plastic ... Read More
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![]() | 1/2" Reduced Shank Drill Bits
Reduced Shank Drill Bits - REDUCED SHANK DRILL BITS. HSS fractional 3/8" reduced shank drill bits. For general use in metal, wood and plastic ... Read More
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![]() | 15/32" Reduced Shank Drill Bits
Reduced Shank Drill Bits - REDUCED SHANK DRILL BITS. HSS fractional 3/8" reduced shank drill bits. For general use in metal, wood and plastic ... Read More
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![]() | 7/16" Reduced Shank Drill Bits
Reduced Shank Drill Bits - REDUCED SHANK DRILL BITS. HSS fractional 3/8" reduced shank drill bits. For general use in metal, wood and plastic ... Read More
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![]() | 13/32" Reduced Shank Drill Bits
Reduced Shank Drill Bits - REDUCED SHANK DRILL BITS. HSS fractional 3/8" reduced shank drill bits. For general use in metal, wood and plastic ... Read More
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