Reddit reviews Bosch CO2144 17/64 In. x 4-1/8 In. Cobalt Drill Bit
We found 1 Reddit comments about Bosch CO2144 17/64 In. x 4-1/8 In. Cobalt Drill Bit. Here are the top ones, ranked by their Reddit score.
Withstands high-temperature applications for extended periods of time (up to 1,100 degreeF)Rigid, thick web design adds stability to bit in tough applicationsSurface hardened to penetrate tough abrasive materialsAvailable in jobber length, full shankBest used for drilling into light-gauge metal, high-carbon steel, aluminum and ally steel, cast iron, stainless steel and titanium
I went with Bosch Cobalt bits rather than that set above :
https://www.amazon.com/Bosch-CO2144-4-1-Cobalt-Drill/dp/B000AESUFS/ref=sr_1_3?keywords=bosch+cobalt+17%2F64&qid=1572282359&sr=8-3
I think these should work better, have one for my pilot hole (17/64) and one for my larger hole 27/64 Also got a 13/32 for the last baffles and will probably use it on the endcap as well.