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Message: <blockquote data-quote="jeallen01" data-source="post: 1127822" data-attributes="member: 176704">None of those would result in a hole wide enough to accomate 2x standard diameter (approx 8mm each + "cleance") sat cables such as WF100, but the 10 & 12mm bits should allow you to use a single run of CT65 "shotgun" cable - so the required bit size will depend on the cable you choose.Also, that's a very cheap set of masonary bits and - depending on the hardness of the wall materials - they might get blunted before the required hole is fully drilled - therefore I'd be very inclined to get some better quality branded (such as Dewalt - my preference) bits from your local Screwfix branch in addition to the set above (and those would still be useable for any future jobs - whereas cheap bits probably won't!)</blockquote>