Metric Tap & Drill Bit Set: Tap thread size: M5 x 0.8 (right hand); twist drill bit size: 4.2mm (right hand). 6542 (M2) high speed steel tap and drill bit set offers excellent heat resistance and hardness for durability and , and good cutting performance for clean, precise holes. Wide Applications: Thread tap and drill bit kit can create new threads or re-thread damaged or jammed threads. Straight flute tap is suitable for through holes or shallow blind holes. Used for cast iron, aluminum, stainless steel, carbon steel, aluminum alloy, bronze and hard plastics. Features: Thread Tap: Straight flute design, clear threads and no burrs, downward chip removal, fast and precise tapping. Machine tap is used in drill presses, tapping, CNC and milling machines. Not recommended for hand use and electric drill tapping. Twist Drill Bit: Spiral flute chip space design to remove chips quickly and cleanly. Provide neat and smooth cuts. : Titanium coated drill bit has enhanced hardness, and rust resistance, heat resistance, and reduces friction for smoother and faster drilling. Uncoated thread tap is great for a wide range of applications. Use with tapping oil to get higher quality threads and more taps. Use an appropriate lubricant to reduce friction and heat build-up. Tips: Drill holes with a twist drill bit first, then tap with a thread tap. The tapping angle should be 90 degrees vertical and stable. The higher the hardness, the slower the speed. Fast speed with small torque; slow speed with high torque. The tapping depth should not exceed 1.5 times the diameter of the tap. Thread tap adopts straight flute design, with clear threads and no burrs. Screw tap provides downward chip removal, fast and precise tapping, suitable for through holes or shallow blind holes. Machine tap is used in drill presses, tapping, CNC andmilling machines. Not recommended for hand use and electric drill tapping. Twist drill bit adopts a spiral flute chip space design to remove chips quickly and cleanly. Cutting edges provide neat and smooth cuts. Use an appropriate lubricant (such as cutting fluid or oil) to reduce friction and heat build-up. 6542 (M2) high speed steel tap & drill bit set offers excellent heat resistance and hardness for durability and , and good cutting performance for clean, precise holes. Titanium coated drill bit has enhanced hardness, and rust resistance, heat resistance, and reduces friction for smoother and faster drilling. Uncoated thread tap is great for a wide range of applications. Tap and drill bit set is widely for cast iron, aluminum, stainless steel, carbon steel, aluminum alloy, bronze and hard plastics. Use with tapping oil to get higher quality threads and more taps. The force must be uniform in tapping operations. Colour:Silver Material:High Speed Steel Package Contents: 1 set x Drill Bit Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.