Powerful DEWALT fan cooled motor with replaceable brushes & variable speed delivers fast cutting action up to 3000 strokes per minute & 29 mm stroke length. High performance reciprocating mechanism & lightweight magnesium gear case offer the user optimized power to weight ratio. Variable speed trigger, lock-off switch & electronic motor brake for quick controlled cuts & enhanced work safety. 4-position key less blade clamp allows quick blade change, flush cutting, & versatility. Modular component design for trouble free servicing. Rubber coated grip to reduce surface vibration & user fatigue. 3-position adjustable shoe for adjusting depth of cut & extends blade life. Exclusive Nano Phosphate Li-Ion battery pack provides 2000 Charge Cycles, more than double that of Ni Cd/ Ni MH packs. Nano Pack produces 36V power at equivalent weight to 18V Ni Cd/ Ni MH pack weight.