Here we pit 3 noice hammers against each other, and a big block of granite!
Bosch GBH 18V22, Flex FX1531 & Hilti TE 422 Nuron all reveal, after much dust generation, how many holes they can drill in granite and concrete, plus how fast they drill, how hot they get, how efficient they are...and probably some more. it's a big video, dig in!

00:00 Intro
01:09 Specs
01:49 Runtime: how many holes can they drill in rock?
05:46 Drill speed
07:33 runtime
07:52 How many holes could they drill in concrete?
09:29 Efficiency
11:07 Drill temperature
12:49 conclusions