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. 10-piece set. General purpose set includes: 2 wood blades, 3 EMT blades, 2 duct blades, 3 PVC blades, and storage pouch.