Keep your drill in working order with the Century Drill & Tool Cobalt Pro Drill Bits. This 10 piece drill bit set features M35 steel construction for lasting use. These robust drill bits are designed for drilling extremely hard materials like stainless steel. The 135 degree quick cut points of this versatile bit set penetrate faster and will not walk or wander across most surfaces. The extreme heat resistance of these versatile drill bits provides years of reliable use.