High performance The center drill bit set contains 7 sizes of 1/1.5/2/2.5/3/4/5 to meet different needs . Drill bits can be used to process centering holes and countersinking of general materials. A reasonable angle of 60 degrees drills precise tapered holes in metal processing, making positioning more accurate, reducing errors and making drilling more efficient. Quick cutting The design of the triangular shank is non-slip, complete grinding process, straight groove design, sharp edge, fast cutting, high work efficiency. Double head design, both ends can be used for cutting, economical, convenient and fast, universal straight shank, convenient disassembly and assembly, Spiral seed The chip flutes are smooth and flat with a spiral wide-angle design, which increases the chip removal space, helps remove chips and debris on the drill bit, prevents chip accumulation, reduces friction and heat, and is conducive to at high-speed operation for faster chip removal without sticking to the tool and smoother drilling. PremiumnEach center drilling cutter adopts 6542 high speed steel material, a high temperature quenching, overall heat treatment, which has good wear resistance, low consumption and durability. Clear cutting edge, corrosion resistance of precision grinding surface, achieve better use effect and extend the service life. Widely used These center drills are used to maintain production parts that require machining between centers or a production center in components. It is suitable for oriented twist drills to process holes to reduce errors. It can be used with lathes and most electronic drills, screwdrivers for cutting, work for steel, iron, aluminum alloys and other metal materials. 7pcs Center Drill Bit Double Ended Drill Bit 60 Degree 1/1.5/2.0/2.5/3.0/4.0/5mm A 60 degree angle center drill is very useful for drilling center holes accurate. Each bit is double ended and ground to a standard 60 degree angle. Fast cutting, good chip evacuation, sharp edge. High strength and hardness. Easy to produce center shims in components or parts requiring machining between centers. HSS Center Drill Bit Double Ended 60 Degree High Speed Steel Set of 7 HSS Steel Lathe Milling Center Drill Bits 60 Degree Centering Drill Set of 7 Center Drill Drill Bits High Speed Steel HSS Double Ended Drill Bit Center Drill Bits Stainless Steel Countersink Lathe Drill Hss Workshop Center Drill Clear scale on the drill bit so you can find quickly the one you need. The 60 degree angle center drill bit is very useful for drilling precise center holes < p>Large spiral groove design is conducive to chip removal, smooth and flat. Made of high quality high speed steel, high hardness, good toughness and sharp and durable. 7pc HSS 60 Center Drill Bits Countersink Center Drill Set Tool The whole center drill bits come with a countersink tool in total of 7 pieces with different sizes, including 1.0 1.5 2.0 2.5 3.0 4.0 5.0, which can meet your different needs. High Speed Cobalt Steel HSS-E Center Drill Bit with 118 Degree Driver and 60 Degree Cone The center drill bit can work with lathe machines and most electronic drills to drill holes in cast steel, cast iron, aluminum alloy, arbon steel, wood, thread mold and other tough materials with hardness 45, it will improve the drilling efficiency. HSS Metal Center Drill Bits 60 1/1.5/2/2.5/3/4/5mm for drilling Wood High Speed Steel Center Drill Bit Kit Combined Milling Speed Tool Set Delivery quantity: 7 pieces Product color: silver Product size: 1 / 1.5 / 2 / 2.5 / 3 / 4 / 5mM Note: manual measurement, please allow 1 - 3cm error!!!