This speed steel step drill bit is designed for precise metal drilling applications, featuring a durable black oxide finish for enhanced performance. The spiral flute design with hex shank provides excellent control and efficient chip removal during use. Ranging from 1/4" to 1/2", this versatile step drill bit allows you to create multiple hole sizes with a single tool. Each step is clearly marked for accurate hole sizing, while the split point tip helps prevent walking and ensures clean entry. This grade step drill bit features durable construction to maintain sharp cutting edges and deliver consistent performance across multiple drilling applications.