Feature :
1 . The sharpness and titanium coating ensures easily cut through most sheet metal,aluminum sheets, wood board, plastic board, and some other materials with ease.
2 . 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).
3 . Cobalt high speed steel along with the titanium coating ensures extreme durability, will stay new and shiny for years to come.
4 . Two-Flute Design and 3-sided shank design. 3-sided shank design prevents drill bits from slipping; 2-flute design provides a faster and smoother cutting, and easy to read rings, 1.5 times faster than basic drill bits. Keep the drill bit clean.

Detail :
Material : High Speed Steel/Bearing steel
Size :
#1 : 3/16" to 1/2" 6 Steps (3/16'', 1/4'', 5/16", 3/8'', 7/16'', 1/2'')
#2 : 1/8" to 1/2" 13 Steps (1/8", 5/32", 3/16'', 7/32", 1/4'', 9/32", 5/16", 11/32", 3/8'', 13/32", 7/16'', 15/32", 1/2'')
#3 : 1/4" to 3/4'' 9 Steps (1/4'', 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4")
#4 : 1/4" to 1-3/8" 10 Steps (1/4'', 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8")
#5 : 3/16" to 7/8" 12 Steps (1/4'', 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8")"

Include:
5x Step Drill Bit Set