THE 6519-31 SAWZALL RECIP SAW DELIVERS BEST IN CLASS SPEED DURABILITY AND POWER WITH 0-3000 STROKES PER MINUTE A 1-1/8"" STROKE LENGTH AND A 12 AMP MOTOR. THE GEAR PROTECTING CLUTCH EXTENDS GEAR AND MOTOR LIFE BY ABSORBING HIGH IMPACT FORCES AND A QUIK-LOK BLADE CLAMP OFFERS FAST TOOL-FREE BLADE CHANGES. TO PROVIDE GREATER USER COMFORT A COUNTER WEIGHTED MECHANISM REDUCES VIBRATION FOR SMOOTHER OPERATION AND A REDESIGNED FRONT GRIP AREA PROVIDES BEST IN CLASS ERGONOMICS. FEATURESUL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" POWERFUL12 AMP MOTOR DELIVERS 0-3000 SPM FOR HIGH PERFORMANCE CUTTING IN A VARIETY OF MATERIALS 1-1/8"" STROKE LENGTH PROVIDES MAXIMUM CUTTING SPEED GEAR PROTECTING CLUTCH EXTENDS GEAR AND MOTOR LIFE BY ABSORBING HIGH IMPACT FORCES CAUSED BY BLADE LOCK-UPS COUNTER WEIGHTED MECHANISM PROVIDES REDUCED VIBRATION FOR SMOOTHER OPERATION QUIK-LOK BLADE CLAMP PROVIDES FAST TOOL-FREE BLADE CHANGES