What is the best tool for drilling into granite for railings?

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Don’t jump down my throat, I’m probably an idiot(I am) but I just hate taking railing jobs that go on granite steps. I use a standard core drill that cuts like butter through mason and other stones/rock. But granite is the absolute bane of my existence. I recently did a job that simply had a granite slab bottom step, the landing was granite tread with stone/mason veneer. It easily took me 10-20 minutes to drill each hole, and with 8 holes in total, do the math. There has to be a tool or dry bit that’s better, but everything I search for online is geared towards granite counters and the bit is only an 1” deep where I need it way longer to drill 4-5” deep holes. So, what do you use? Because a wet drill ain’t it, and I’m done taking 2 hours for an install that would take me 45 minutes to do on any other type of stone.
Reply:These look to be more than 1"  long....  https://www.usagranitetools.com/prod...re-drill-bits/or these $https://www.hilti.com/c/CLS_POWER_TO..._7126/r7563856Last edited by John T; 1 Day Ago at 07:32 PM.Miller 211Hypertherm PM 451961 Lincoln Idealarc 250HTP 221  True Wisdom only comes from Pain.
Reply:I've only done it once, but used a diamond core drill, wet.  Went fine, but I wasn't going for production rate, of course with only a couple holes so I don't recall time it took.  Granite is hard, so it will just take longer.  Increase your billing time appropriately to compensate for that.-DaveXMT304 with: 22A Feeder, or HF251 Hi Freq DC TIG air cooled
Reply:Only did it once also. The whole stoop and steps were solid granite. Took about 4-5 times longer with a wet diamond core drill. Diamond is the only way I know to get it done. I never want to use a hammer type dry core on any job and risk cracking off a chunk or corner.

Ernie F.
Reply:

Originally Posted by metalman21

... Diamond is the only way I know to get it done. I never want to use a hammer type dry core on any job and risk cracking off a chunk or corner.