****** - Verified Buyer
4.5
Worked great with a core adapter to make it through 8 in. of concrete.This has held up to the forces I have applied to it. Almost got a 5 star. The one feature it is missing is having flats machined onto it for a chuck. They don't have to be super huge, just enough that the chuck has a flat surface to grip onto when tightening. That would completely eliminate any slip that may occur from running a large hone/bit on the end of it.Worked well, but the shaft for the drill is round, would have been a 5 star review if it was hexagonal to prevent slipping in the drill chuck. I was using it with a 3" diameter concrete core drill, so there was a fair amount of torque which caused the adapter to slip in the drill chuck occasionally.Adapter fit my 6 inch, 40 deep hole saw with no issues. I have made only one hole with it sofar, but no issues yet.It broke the first time we used it. Waste of money!Fit my drill and worked well with a 3" Core Drill Bit. Read the reviews where it was bent or broke easily but I believe that may have been due to operator error and not the product. Arrived as scheduled and worked great. I would recommend this if you need a core drill bit.I like it is a good quality toolDoes the job!I used the Core Drill Adapter 1-1/4"-7 Male to SDS PLUS adapter with a Bosch Bulldog and 4.5" core bit to bore some holes in 4" concrete slabs, and even though I was VERY careful to not let the bit seize in the hole or apply sideways/angled torque on the bit, the SDS-end of the adapter bent.This bit is just a bad idea for use with larger (2"+) core bits for concrete boring because the diameter of the SDS adapter is just too small to give it enough strength to handle the torque of a larger core bit in this application.Nice adapter, any longer and you might get a bit more torque flex.Worked as needed with my dewalt sds and a 7/8 Milwaukee core bitover Price
