Cordless jigsaw series bosch gst bosch professional workable materials wood cutting saws plastoc metal cutting saws min strokesminute 1 500 maximum strokes per minute 2 700 pendulum action stages 4 stroke height 18 mm power supply battery operated maximum cutting depth wood 120 mm maximum cutting depth aluminium 20 mm maximum cutting depth steel 8 mm battery voltage 18 v battery capacity 4 ah number of batteries 2 type of battery li ion weig