3pcs HSS Step Bits Spiral Grooved Step Drill Drills Bit 4mm to 12mm/20mm/32mm Cut Tool Set Comes complete with carry case
Description
- This Step Drill Bit set includes 3 sizes(4-12mm, 4-20mm, 4-32mm), which meet your different needs perfectly.
- The ladder of its unique structure, a bit can open a variety of specifications of aperture.
- Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken.
- Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them was unable, but it is possible.
- The use of tools: drill, bench drill.Work while water cooling, can effectively extend the service life of drill bit,recommend drilling rate of 250-250 RPM.
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. Specifications: Material: High-speed Steel (HSS 4241) Surface Treatment: Titanium Coated Shape of Shank: Hexagonal Shank Diameter: 6.35mm (Hex Shank) Overall Length: 4-12mm Length: Approx. 66mm/ 2.60" 4-20mm Length: Approx. 76mm/ 2.99" 4-32mm Length: Approx. 102mm/ 4.02" Sizes: 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm)--15 steps 4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm)--9 steps 4-12mm (4mm, 6mm, 8mm, 10mm, 12mm)--5 steps Package Include: 3 X Step Drill Bit
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