The bit in a hammer drill, as it?s spinning around, is also punching - or hammering - up and down really fast into the material being drilled. Here is some additional information about Bosch Electric Drill. Voltage: 120VAC, Chuck Size: 3/8".
Features
Drill Chuck Type: Keyless
Voltage: 120VAC
Corded/Banded: Corded
Amps: 6.3
Features: 1 1/2" IPS, Slip Union Connectorson both Inlet and Discharge Ports