Cobalt high speed steel along with the titanium coating ensures extreme durability, will stay new and shiny for years to come.
Different sized shanks ensure compatibility with 1/4, 3/8 and 1/2 in. chuck sizes.
Non-walking drill tip provides fast and smooth drills on steel sheets, aluminum sheets, wood board, plastic board etc. (the board must be smaller in thickness than the height of step drill bits).
Made of super strong HSS steel for added durability and bit life.
Set includes five standard SAE step drill bits with a two-flute design for faster, smoother cutting Suitable for drilling holes in plastic, aluminum, copper, stainless steel and many other types of sheet metal.