Designed to Maximize The Cutting Performance Of The New M12 Hackzall® Reciprocating Saw, These Blades Feature A Thin Kerf Design That Reduces The Amount Of Drag and Resistance While Cutting, Resulting In More Cuts Per Battery Charge. Specialized Blades Are Available For A Variety Of Hvac, Electrical, Plumbing and Maintenance/Repair Applications. Includes 5 Blades.