4-12/20/32mm Coated Step Drill Bit Drilling Power Tools for Metal High Speed Steel Wood Hole Cutter Step Cone Drill (Color : Hexagon Shank3, Size : Hexagonal)

Features:1, The ladder of its distinctive structure, a bit can open a variety of specifications of aperture.2, Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken.3, Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them was unable, but it is possible.4, 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.Specification:Shank: 6.35 mm (dia)Color: golden, as picture shows3 sizes: 4-12mm, 4-20mm, 4-32mm4-12mm Length: approx. 6.8cm/ 2.68''4-20mm Length: approx. 7.3cm/ 2.87'4-32mm Length: approx. 10.3cm/ 4.06''4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm)4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm)4-12mm (4mm, 6mm, 8mm, 10mm, 12mm)This step drill is made from high quality steel, and with the coated to reduce friction and heatIt is very suitable for using to cut holes in a variety of materials including steel, brass, wood, plastic, etcPackage included:1 x PC step drill(We don't have retail package)

• Material: High Speed Steel; Shank: 6.35 mm (dia); Color: golden, as picture shows
• The ladder of its distinctive 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.