Finally I got it Hitachi 725105 Spline 1 1/2-Inch x 17-Inch x 22-Inch Hammer Bit 4 Cutter

Hitachi 725105

I had a major project that required me to drill over 400 1 1/2" holes in concrete aggregate and started to do internet searches for bits reviews to help me decide what bit to get. Regretfully, I wasn't able to find any reviews comparing hammer bits. Because I needed this bit only for this project, I decided to get this bit because it was the cheapest 1 1/2" spline bit on Amazon at the time. When I received the bit, I was pleasantly surprise to find it made in Germany like the more expensive hammer bits.I have now drill 200 holes in very rocky aggregate and the bit is holding up great with virtually no signs of wear.So ... SPLINE 1-1/2"x17"x22" 4CUTTER Centering Point Spacious Multi fluted spiral ... »» Read more...

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