3-Piece Step Drill Bit Set, 4-12mm/4-20mm/4-32mm HSS Conical Drill Bit with Titanium Coating, Double-Slotted Steel Metal Drill Bit, Step Drill Bit with Hex Shank for Wood, PVC, and Metal

【Three Different Sizes】 The package includes three conical drill bits in sizes 4-12mm, 4-20mm, and 4-32mm, with different sizes to meet various drilling requirements. They feature a universal standard 6.35mm hexagonal shank diameter, making them compatible with a wide range of drilling machine models. They can be used for aluminum, wood, thin iron, PVC materials, plastic boards, etc.

【Reliable Material】 Made of high-quality steel with a titanium coating to increase surface hardness and improve the drill bit's cutting edge and durability. This reduces friction and excessive heat during use, and the double helix design prevents slippage and helps move chips during operation. The 118° tip design allows you to drill at multiple angles. 【Precise Cutting】 Each conical drill bit is laser-marked for precise selection. The sharp drill bit cuts more accurately into the material without abrasion, ensuring optimal hole spacing. As the hole diameter increases, the rotation speed is reduced to guarantee a safe cut. 【Double Spiral Design】 The double spiral design allows for more even drilling and effectively prevents resistance or stalling during use. It can be used for drilling or boring, and offers faster speed and accuracy to ensure clean drilling or boring results. Improve work efficiency

【Easy to use】 To effectively extend the drill bit's lifespan and prevent softening or discoloration, add water or cutting fluid to the drill bit to keep it at a low temperature during operation. Clean the surface promptly after use to prevent corrosion caused by other substances.