SDS MAX Diamond Core Bit Diameter 32-150 mm Length 200 mm Core Drill Bit Core Drill M22 with Pointed Thread for Hammer Drills (DM = 132 mm)

This core drill bit was purchased to drill soft stone, it was not capable of soft stone and the pilot bit was 5mm of centre.

Worked a treat with my Titan SDS. I did drill the 8mm hole first then assembled the core drill with the masonry drill as the centre. Slow and steady dry cut worked a treat, no noticeable wear on the 4 tips. Only 4 stars because I had to turn the end of the arbour down to 13mm to fit the chuck on my SDS drill, be aware this arbour needs a large chuck unless you can turn.

If your drill is SDS plus the Starret BMA02 1/2BSP fits this. I didn't realise how hard it was to find a SDS max drill that just has drilling function. So the Arbor it came with I couldn't use. Did the job and still looks pretty new.

The central drill was off centre but correctable. I managed two holes through cavity brick and block without any drama, but perhaps a little slower than expected.