The DRILL BIT ASST 29 PC MECHANICS LENGTH set includes sizes ranging from 1/16" to 1/2" by 64ths, designed for exceptional versatility. Its NOMO (Nitride on margin only) coating maximizes the number of holes drilled and significantly outperforms traditional cobalt drills. Engineered with a 135 split point and 3 flats on sizes 3/16" and larger, these bits ensure precise drilling in materials like martensitic stainless steel, including type 410. The set is conveniently housed in a water-resistant plastic case for durability and easy transport.