The Milwaukee M18BSX Reciprocating Saw is fitted with a high performance 4-pole motor that delivers maximum power whilst maximising the power to weight ratio. The counter balance mechanism reduces vibrations to 15.2 m/s² in wooden beams. It is fitted with Milwaukee\'s patented FIXTEC clamp for fast and easy keyless blade change. REDLINK™ overload protection electronics in tool and battery pack deliver best in class system durability. M18BSX-402C: 2 x 18 Volt 4.0Ah Li-Ion Batteries. M18 BSX-0: Bare Unit, No Battery or Charger. Specification No Load Speed: 3,000/min.Stroke Length: 28.6mm. Capacity: Wood 300mm.Milwaukee M18 BSX-0 Reciprocating Saw 18 Volt Bare Unit, No Battery or Charger Supplied.