You can use these to drill holes to any materials. Work on plastic, woods, and most metals, including steel, brass, aluminum, and copper.
PERFECT FIT SHANKS
The shanks are small enough that they should fit any standard size chuck such as that on a small drill press or hand-held drill.
MADE OF HIGH-GRADE MATERIAL
The drill bits are made of drop forged, heat treated and fully polish classic high-speed steel with Titanium coating for proven capability and durability.
COMES IN DIFFERENT SIZES
Comes in three sizes: 4-12mm with 5 steps, 4-20mm with 9 steps and 3-12mm with 10 steps. This takes the guessing out of drilling by supplying the proper depth for you.