The 7900 Chicago Pneumatic Heavy-Duty Reciprocating Saw has the power at 10,000 strokes per minute allows you to cut through material with ease.  It's a great economical tool for body, exhaust and muffler work.  The adjustable guard/guide allows the operator to set depth of cut, and the ergonomic design makes this tool easy to handle.  Includes 3 replacement blades.