Crafted from high speed steel, it features wear resistance and strength, 6.35mm hexagonal shank for stable clamping in various drills to minimize slippage This drill set is compact and easy to carry or store, making it a practical addition to any workshop Ideal for both home enthusiasts and professional craftsmen seeking for their projects Perfect for industrial applications and everyday repairs on materials like cast iron, aluminum, steel, stainless steel, and This 5pcs step drill bit set delivers high efficiency drilling, penetrating materials to productivity and reduce work time, Manufacturer: Ywmsfl