Descriptions:  HSS-Co Cobalt Reduced Shank Drill Bit M35 13.5-30mm HSS Drill Bit 1/2 Inch Shank for Wood Metal Stainless Steel Drilling.     Specifications:  Material: M35 High Speed Steel(HSS-Co Cobalt).  Tip Angle: 135°.  Shank Diameter: 1/2 Inch.  Cutting Diameter:  13.5mm, 14mm, 14.5mm, 5mm, 15.5mm, 16mm, 16.5mm,  17mm, 17.5mm, 18mm, 18.5mm, 19mm, 19.5mm, 20mm,  20.5mm, 21mm, 21.5mm, 22mm, 22.5mm, 23mm, 23.5mm,  24mm, 24.5mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm.  Fits for Material Drilling: Stainless steel, Die steel, Cast iron, Aluminum alloy, High-carbon steel, Wood.     Features:  1. Made from industrial grade High Speed Steel for increased durability. 5% cobalt alloy is heat and abrasion-resistant.  2. Ideal for drilling in tough metal, including heavy-duty abrasive alloy metal drilling on hardened steel.  3. 135-degree split-point tip starts drilling immediately with less force and eliminates 'walking' across the work surface.  4. Large spiral chip, enlarged chip flute, drilling smooth, high temperature resistant and non-sticking tool.  5. Fits for most drilling machine and tools and easy to identify drill size.     Package Includes:  1Pc x HSS-Co Reduced Shank Drill Bit.  1Pc x Storage Box