The blades are made of alloyed steel and heat treated to give you them strength and durability. You'll always be a step closer to done with these Craftsman screwdrivers. 10 Slotted Screwdrivers: 3/32” x 1-1/2" (#41541), 1/8” x 2” (#41421), 1/8” x 4” (#41589), 3/16” x 1 1/2” (#41854), 3/16” x 4” (#41581), 3/16” x 6” (#41577), 3/16” x 9" (#41582), 1/4” x 4” (#41583), 1/4” x 6” (#41584), 4-in-1 Pocket Screwdriver.
