Recommendation for 100mm masonry hole saw

[Ferdinand]

I need to drill a 100mm hole for a fan duct in a 225mm brick wall.

 

Can anyone recommend a suitable product?

 

I expect to use it occasionally for a number of years - say half a dozen times a year.

 

If I can just pick it up from Wickes or Screwfix that would be a bonus but is not essential.

 

Thanks

Ferdinand

 

[Nickfromwales]

The titan set in SF seems ok. 

 

http://www.screwfix.com/p/titan-diamond-core-drill-8-piece-set/1154D?kpid=KINASEKPID&cm_mmc=GoogleLocal-_-Datafeed-_-Tools&cm_mmc=Google-_-Product Listing Ads-_-Sales Tracking-_-sales tracking url&gclid=CJrh35CFydECFY8Q0wodZOYAxA

 

Just borrowed my mates titan set as my 4" cup just wore out after about 9 years of abuse. Bloody good bit that was. Gutted. 

I can report that the titan one works perfectly well and is cheap enough to keep in the shed for 'whenever'