These step drills are very suitable for cutting holes in a variety of materials including steel, brass, wood, plastic and more.
Titanium coated to reduce friction and heat.
High-speed steel step drill, nice quality and durable.
These drill bits works great in making a smooth, clean and perfectly round hole.
Suitable for punch holes through sheet metal, steel plate, aluminum plate, brass or wood.
This drill bit set includes 3 sizes(3-12mm, 4-12mm, 4-20mm), which meet your different needs perfectly.