HSS Step Bits, 4-42mm High Speed Steel Cone Drill Bits Hole Cutter for Wood, Stainless Steel, Sheet Metal (Silver)

• Not only expanding holes, but also deburring, chamfering and cutting.Applied to impact drivers, drill press, and power drills/drivers.
• Two-fluted design provides faster, smoother drilling, Provided with small pressure and the sets can cut through wood, sheet metal, steel and other surfaces.
• The step drill bit is made of upgraded high speed steel.Coated by titanium, improve the wear and corrosion resistance.
• It is an indispensable tool for carrying out precision work with good control of the hole diameter.Perfect for DIY lover!
• Step Cone Drill Bits design for precision drilling different size holes from 4mm up to 32mm in diameter,optimum speed and accuracy.

High Quality Materials: Made from high quality HSS steel.Ideal for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc. Suitable for multiple scenarios: Only Large HSS Drill Bit, quality tool for jobs of all sizes. Titanium coated to reduce friction and heat. Heat treated and highly polished. Drills perfectly round holes in steel, brass, plastic, wood etc. 3 sided shanks design in order to prevent slippage when in chuck. Two flute design provides faster, smoother and cleaner cuts each step is clearly labelled with the depth diameter in steps Specification: Surface treatment: Titanium Plating Colour: Golden/silver Ranges for 4 42mm Has a 10mm Shank Golden Extra Large Drill; 4mm, 6mm, 9mm, 12mm, 15mm, 18mm, 21mm, 24mm, 27mm, 30mm, 33mm, 36mm, 39mm, 42mm Silver Extra Large Drill; 6mm, 9mm, 12mm, 15mm, 18mm, 21mm, 24mm, 27mm, 30mm, 33mm, 36mm, 39mm