Rated 2.4 out of 5 by 5
Rated 5.0 out of 5.0 by RipD Good bits for the price
These bits are great. You need to have a decent drill to drive them. I tried them with a large but inexpensive hammer drill and all it did was dull the bits. Switched to my Milwaukee 12V hammer drill and these worked great. They need a little pressure in my experience and seem to cut better when they're hot. But don't cook them. I do 1/2 an inch, and let it cool off for a few seconds then another 1/2 inch.
These bits slow down when they hit rebar in the concrete, but will go through with some patience. They are good for maybe 15 1.5" deep holes, or 22" in good, reinforced concrete. But for what they cost, you can't expect much more. They outperform similar Bosch bits I have purchased, which are 2x the price.
May 2, 2016
Rated 1.0 out of 5.0 by DaveCt lasted 4 holes
This does not work on concrete block -- at least not with a regular drill (may have better luck with a hammer drill). After 4 holes the bit was useless -- polished smooth. I need a new bit -- and won't buy this brand again.
January 31, 2016
Rated 4.0 out of 5.0 by okrah Use only with a hammer drill
I bought a 75-pak of 1-3/4 FH Tapcon screws, and the cheapest hammer drill on the shelf. I drilled holes for all 75 screws with the same bit. Tapcon's recommendation for a hammer drill is really a requirement. Without a hammer drill, the bit will just spin and burn up on the 1st hole.
February 23, 2015
Rated 1.0 out of 5.0 by wrecker drilled one hole and bit was worn out
this drill bit is one of the lowest quality I have ever used, out of the package it had a very noticeable run out and the carbide tips were so poorly welded into the tip that I had to clean the weld material away from leading edge of bit to start.
August 1, 2014
Rated 1.0 out of 5.0 by CCTVInstaller Drilled one hole and then it did not work anymore
Junk, Does not work as advertised. Tapcon screws and bits have not worked for me. Used in hammer drill as per directions, it drilled one hole and then would not drill anymore. Tapcon screw did fit in hole
July 27, 2012