WKS 7Pcs 2mm 3mm 4mm 5mm 6mm 7mm 8mm Black Oxide Finish High-Speed Steel Round Straight Shank Spiral Flute Twist Drill Bits For Stainless Steel,Alloy and Mould steel

Application:Designed for drilling deep holes or deeply located holes,drills in steel,cast steel alloyed and unalloyed,grey cast rion,malleable cast rion graphite. Advantages:suitable for high performance drilling.strengthening core drilling and ordinary blade length,enhance the rigidity,drilling for 4-5times the diameter of the hole,Suitable for speed and feed speed higher,increase the service life of drill bit.Machining surface finish,high machining efficiency,can be eliminated after the procedure. Product specification: 1.5-1.7mm(cut diameter):Cut Length:18mm/Overall Length:40mm 1.8-1.9mm:Cut Length:22mm/Overall Length:46mm 2-2.1mm:Cut Length:24mm/Overall Length:49mm 2.2-2.3mm:Cut Length:27mm/Overall Length:53mm 2.4-2.7mm:Cut Length:30mm/Overall Length:53mm 2.8-3.0mm:Cut Length:33mm/Overall Length:61mm 3.1-3.3mm:Cut Length:36mm/Overall Length:65mm 3.4-3.7mm:Cut Length:39mm/Overall Length:70mm 3.8-4.2mm:Cut Length:43mm/Overall Length:75mm 4.3-4.7mm:Cut Length:47mm/Overall Length:80mm 4.8-5.3mm:Cut Length:52mm/Overall Length:86mm 5.4-6mm:Cut Length:57mm/Overall Length:93mm 6.1-6.7mm:Cut Length:63mm/Overall Length:101mm 6.8-7.5mm:Cut Length:69mm/Overall Length:109mm 7.6-8.5mm:Cut Length:75mm/Overall Length:117mm 8.6-9mm:Cut Length:81mm/Overall Length:125mm

• Includes the commonly used drill bit sizes:2mm,3mm, 4mm,5mm,6mm 7mm and 8mm shank bits
• Suitable for wood,cast iron,copper,stainless steel,mould steel,zinc alloy and aluminum alloy .
• Round shanks allow use with a wide variety of toolholding systems
• tools are good for most general purpose applications, offering a combination of hardness and tough
• Size markings are located above the shank to prevent wearing away