Best for breaking up concrete slab that is 4 - 6" thick. Electric breakers will break some rock in the area but a pneumatic breaker is better for rock.

Specifications
Blows per minute 1,000
Impact energy 36.4J
AMPS (115V) 15.0
Bit type 1-1/8" Hex shank
Overall length 32-1/2"
Weight 64.0 lbs.