Features:

?Step drill bits are constructed from premium HSS combined with a coating to ensure durability.

?Double cutting blades design enables a faster and smoother cutting.

?The HSS cobalt multiple hole 50 sizes step drill bits can work with stainless steel sheets, aluminum alloy, plastic material, and wood.

?Includes five standard step drill bits with center punch,which can replace 50 individual drill bits, you can process 50 different kinds of diameter holes with the five pieces.

?A well-organized box provides easy storage and transport, a must-have for DIY lovers and HVAC professionals.

Step Drill Bit Sizes:

?3/16'' to 7/8'' Drill Bit: 12 Steps (3/16'', 1/4'', 5/16'', 3/8'', 7/16'', 1/2'', 9/16'', 5/8'', 11/16'', 3/4'', 13/16'', 7/8'').

?1/4'' to 3/4'' Drill Bit: 9 Steps (1/4'', 5/16'', 3/8'', 7/16'', 1/2'', 9/16'', 5/8'', 11/16'', 3/4'').

?1/8'' to 1/2'' Drill Bit: 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'').

?3/16'' to 1/2'' Drill Bit: 6 Steps (3/16'', 1/4'', 5/16'', 3/8'', 7/16'', 1/2'').

Aluminum Case Dimension: 6'' x 4'' x 1 1/2''

Package Includes:

5 x Step Drill Bits

1 x Aluminum Case