Juego de 3 brocas escalonadas de ranura helicoidal, aptas para taladrar acero, latón y madera.

【Multiple Sizes】: Includes one 15-speed drill bit (4-32mm), one 9-speed drill bit (4-20mm), and one 13-speed drill bit (4-12mm). Three sizes to meet your different needs. A nylon storage bag is included in the package. 【Superior Materials】: Made of classic carbon steel, offering superior performance and durability, suitable for drilling holes in wood, aluminum, copper, stainless steel, and many other thin metal sheets. The drill bit is particularly suitable for machining copper and aluminum parts, mold steel, spring steel, cast iron, iron, and other metal materials. 【Precision Positioning Drill】: When you press on the surface, it generates an automatic, high-impact spring-loaded force; the adjustable cap allows you to adjust the impact force. 【Time-Saving, Efficient, and Fast】: This tapered drill bit is made of carbon steel, reducing heat and friction, cooling quickly, and automatically removing debris from the hole during drilling. The spiral design prevents slippage, making drilling easier and more efficient.