Product Description

High-speed steel 4241 (suitable for general hardness workpieces, such as iron plates, plate thickness below 5MM)

Specifications: 4-32mm (4,6,8,10,12,14,16,18,20,22,24,26,28,30,32mm)

4-20mm (4,6,8,10,12,14,16,18,20mm)

4-12mm (4,6,8,10,12mm)

Product packaging: The default is OPP plastic bag packaging, if you need wooden boxed, single plastic pipe, bag and other customers can contact customer service to change the price!

Surface treatment: titanium plating

Description

These step drills are very suitable for cutting holes in a variety of materials including iron, aluminum, brass, wood, plastic and more. Special step structure, one drill bit can open a variety sizes of holes, so one step drill is worthy a box of drill bits.

Features:
Titanium coated to reduce friction and heat.
High-speed steel step drill, higher quality and more durable than ordinary twist drill.
These drill bits works great in making a smooth, clean and perfectly round hole.
Suitable for punch holes through sheet metal, iron plate, aluminum plate, brass, wood, plastic, etc.
This drill bit set includes 3 sizes(4-12mm, 4-20mm, 4-32mm), which meet your different needs perfectly.

NOTE:
1. Hand drill and bench drill can be used for these step drills.
2. Use water injection for cooling when drilling, which can effectively prolong the using life of drill bit.
3. Recommend drilling rate of 250-400 RPM.
4. You can drill sheet within 5mm with our step drills.
5. Remember that only M35 step drill is for stainless steel. Never use these HSS 4241 step drills to drill stainless steel!