DEWALT(TM) BREAKAWAY Reciprocating Saw Blades Are Designed For The Contractor Who Is Tired Of Throwing Away Half-Used Blades. The BREAKAWAY Feature Allows The User To Remove The Used Section Of The Blade And Then Reinsert The Unused Section Back Into The Saw. It’s Like Getting Two Blades In One. Made in the USA with Global Materials. The 6″ BREAKAWAY Reciprocating Saw Blade Breaks Into A 4″ Blade, Which Allows Up To 1″ Material To Be Cut. The 9″ BREAKAWAY Reciprocating Saw Blade Breaks Into A 6″ Blade, Which Allows Up To 2″ Material To Be Cut. The BREAKAWAY Blades Have Been Designed With A Thick Body For Durability And Feature A 14/18 Variable Tooth Pattern For Optimized Cuts In A Variety Of Metal Cutting Applications. Case Holds Blades & Is Designed To Fit In Power Tool Kit Box For Safe Blade Storage, Includes: DWABK461418 (6) – 6″ BREAKAWAY Reciprocating Saw Blades And DWABK491418 (2) – 9″ BREAKAWAY Reciprocating Saw Blade