| BK-ER6 | BK-JS6009 | BK-ER3612BR | 
| Power: 500w | Power: 750w | Power: 1650w | 
| No-load speed: 30000r/min | No-load speed: 0-3000r/min | No-load speed: 23000r/min | 
| Capacity: 6mm (1/4") | Cutting cap: 65mm | Drill chuck: 12mm | 
| Rated voltage: 110-240V | Rated voltage: 110-240V | Rated voltage: 110-240V | 
| Rated frequency: 50/60hz | Rated frequency: 50/60hz | Rated frequency: 50/60hz |