High-speed steel, high quality with good durability for you to use 
	Professional drill for deburring, chamfering, elliptic hole enlargement 
	Suitable for punch holes through sheet metal, steel plate, aluminum plate, brass or wood 
	This drill bit set includes 3 sizes(4-12mm, 4-20mm, 4-32mm), which meet your different needs perfectly 
	 
	Specifications: 
	Finish: Titanium 
	Type: Step Drill 
	Head Type: Hexagon Shank 
	Material: High-speed steel 4241 
	Surface Treatment: Titanium coated 
	 
	Length: 
	5 Step Bit: 4-12mm Length: Approx. 6.7cm/ 2.64″ 
	9 Step Bit: 4-20mm Length: Approx. 7.4cm/ 2.91″ 
	15 Step Bit: 4-32mm Length: Approx. 10.2cm/ 4.02″ 
	 
	The 3 Bits Sizes: 
	15 Step Bit: 4-32mm (4,6,8,10,12,14,16,18,20,22,24,26,28,30,32mm) 
	9 Step Bit: 4-20mm (4,6,8,10,12,14,16,18,20mm) 
	5 Step Bit: 4-12mm (4,6,8,10,12mm) 
	 
	Package include:
	1x step drill bit