Higher speeds can be used for softer materials, while lower speeds should be applied for harder materials. (Notice: The use of coolant during the drilling process effectively reduces temperatures, extends tool life, and improves machining results., ) Jobber Twist Drill Bit METALLIXITY Drill Bit (4.2mm) 6Pcs, M2 High-Speed Steel Straight Shank Small Drill Bhushan Square M3 High Speed Steel, Polished at Rs 60/kilogram in New Delhi | ID: 14488779973 15pcs 1.5-10mm M35 Cobalt HSS Co High Speed Steel Drill Bits Set Metal [3]: INSTRUCTION - Set the suitable speed according to the material's hardness and the drill bit diameter. [5]: QUANTITY INCLUDED - Set contains 2pcs x 4., 2mm twist drill bits, perfect for home use, repairs, and small manufacturing projects. Gold Finish can further enhance the drill bit's wear and corrosion resistance, thereby extending drill bit's service life. Please refer to the details provided on the product page. M35 High Speed Tungsten Carbide Drill Bit Set 3-12Mm For Stainless Steel Alloy Cast Iron... [2]: SPECIFICATION - The drill bit has a cutting diameter of 4., 2mm, a shank diameter of 4., 2mm, a flute length of 43mm/1., 69 inch, an overall length of 75mm/2., 95 inch, and a 135° point tip.
