SATA HSS Drill/Tap Bit

50803 5-piece high-speed steel composite tap and drill set M3x0.5MM Product Description ● HSS high-speed steel material, fully ground process ● Time-saving and labor-saving, one-step operation to complete the entire process of drilling, tapping, deburring/countersinking ● Back-tapping design after tapping to prevent damage to the thread after over-drilling ● Tapping speed is slower than drilling speed, and a little lubricant is required ● Applicable thickness: 3.5mm thick medium carbon steel plate ● Scope of application: Generally used for through-hole processing in carbon steel, alloy steel, cast iron, etc.