3 X Titanium Coated Stepped Drill Bit, 4-12mm, 4-20mm, 3-12 mm HSS Step Cone Drill Bit
Pakage: 3 pcs Step Drill and 1pcs Automatic wood cutter tools. Contain 3 size : 4-12mm, 4-20mm and 3-12 mm.
Size of hole drill bit : 77*20mm, 77*12mm, 67*12mm (Length* Width). Material: high speed steel (HSS4241). Size of Punch: 128mm Length. Material: high speed steel HSS.
This hole cutter drill bit is used to drill holes or enlarge holes on many kinds of thin metal / plastic sheets up to 3mm thick, such as: steel sheet, aluminum alloy sheet, plastic sheet, wood sheet, brass sheet.
Easy drilling: Dual slots and size gauge designs provide faster, smoother, and more accurate cuts. Tips: Remember to drill a little pilot hole first as it's way easier for the step bit to get started.
Automatic center punch: Delivers an automatic, high-impact, spring-loaded strike when pressed against surface, adjustable cap regulates striking force.