The RUKO conical countersink achieves its performance through its unique cutting geometry, featuring a specially developed variable back taper, transition radii, and an extra-wide flute. It offers optimal performance in almost all materials and applications, requiring significantly less feed force, with up to 60% longer tool life, up to 30% faster sinking, extremely smooth operation, optimal sink pattern, and ideal chip removal. HSS Co 5: High-performance high-speed steel with a 5% cobalt content. It has high toughness and heat resistance, suitable for drilling in difficult-to-machine materials with a strength of up to 1100 N/mm². RUKO Nano Technology: extremely high wear resistance and hot hardness, suitable for both standard and high-performance machining, no material welding, optimal smooth surface, and extremely high nano-hardness.