Description of Irwin Tools 4935444 Speedhammer Masonry
Optimized for cutting through rebar-reinforced concrete at high speeds. Premium steel delivers increased core strength, durability and bit life. Twice the carbide in the tip compared to other masonry bits, for 2x longer bit life. The flute has an outer groove that quickly removes dust and dissipates heat, increasing drilling speed and extending bit life. Shank fits all SDS Plus and Hilti TE-C rotary hammers.
As a result of using this product I found that it was completely ineffective when drilling INTO concrete... i had to keep replacing the bits after only a few uses, which was incredibly frustrating. The only positive was that they were relatively cheap. However, the quality was so poor that I ended up spending more in the long run on replacements. I would not recommend these to anyone in the Industrial and Scientific field..
Pros
Powerful and efficient for drilling through masonry quickly.
The bit was great for concrete but I bought it thinking it would go through both concrete and rebar (based on the description). It does NOT go through the rebar. Now I need to buy a separate rebar bit.
Pros
Optimized for cutting rebar at high speeds. High quality steel offers increased core strength, durability and bit life