Check the listing for details. Twist Drill Bit 37/64" High-Speed Steel 4341 5.7" Length Black & Gold Oxide. Condition: New. Listed at 11.67 USD. Material: Made of high-speed steel 4341, with higher hardness and good wear resistance, impact resistance and heat hardening, and is suitable for cutting workpieces with larger size and heavier load.Black and Gold Coating: The black and gold coating enhances the twist drill's wear resistance and heat dissipation properties, reducing friction and extending the tool's lifespan.Features: Can take into account a variety of models, hand drill, percussion drill, lithium drill, and bench drill can be adapted, effectively for precision drilling tasks on various workpieces. Applications: Jobber drill is used for drilling through hard materials such as stainless steel, alloy steel, cast iron, aluminum, copper, wood, malleable iron, aluminum, plastic, and other metals commonly encountered in machining applications.