6pcs Hex Stubby Drill Bits Precision HSS Drill Bits Titanium Coated Drill Set

Description This is a professional drill bit set. It includes drill bits with diameters of 2.5cm 3.3cm 4.3cm 5.4cm 6.8cm 8.6cm each size comes with 1 piece. Industrial grade high-speed steel for better durability and sturdiness. Suitable for drilling in tough material including aluminium cast iron brass copper magnesium alloy plastics etc. Feature - Color: Yellow - Material: Stainless steel - Bit diameter: 2.5cm 3.3cm 4.3cm 5.4cm 6.8cm 8.6cm; Length: 5.8cm - High-speed steel with coating treatment tougher and more abrasion resistant for longer working life and high work efficiency. - design drill bits accurate and fine increase drilling speed. - Mainly for drilling wood plastic fiberglass printed circuit board and metal including copper aluminum tool steel cast iron and heavy-duty abrasive alloy metal etc. - for home DIY building and engineering use etc.