| Model | FREE SPEED RPM | AVERAGE AIRCONSUMPTION( 25% ) SCFM | Chuck(Inch) | Sound dBA(pressure/Power) | Speed Reducer | Angle(Degree) | EXHAUST | LENGTH | WEIGHT | AIR PRESSURE | AIR INLET | |||
| m/m | in | kgs | lbs | psi | kg/c㎡ | |||||||||
| BW-638H | 1,900 | 4.0 | 3/8 | N/A | 3 gear, caged | 90 | Front | 192 | 7.6 | 0.92 | 2.0 | 90 | 6.3 | 1/4" |

