Pack contains five 3 1/2in. metal scrolling Hackzall blades designed to maximize the performance of the Milwaukee M12 Hackzall, Item# 334222. U.S.A. Blade Application: Metal scroll, Blade Size (in.): 3 1/2, Blades (qty.): 5, Blade Type: Hackzall Thinner kerf design allows for 35% more cuts per charge than standard Sawzall blades