Hitachi CR13VBY 12-Amp Reciprocating Saw with User Vibration Protection Technology User Vibration Protection (UVP) technology incorporates a counterweight mechanism that reduces full-load tri-axial vibration by over 65% significantly reducing vibration transfer to the user Variable speed dial and trigger allow the user to adjust the cutting speed optimally for the application for less waste and more control 2 mode cutting mechanism- straight mode and "swing" mode that produce significantly less rebound effect as compared to traditional orbital action for a more efficient cut in wood materials Constructed with a triple seal design to protect from dust and debris generated during use- also protects from water waste when cutting into pipes Ergonomic shape and slip/heat resistant grip are easier to handle and make it easy to use all day