Set containing various drill bits, suitable for a variety of trades including electrical, plumbing, metal work, automotives and maintenance repairs. Constructed from custom-engineered steel with black oxide coating for longer life. Features step drills, ideal for drilling into materials such as copper, brass, stainless steel and plastics, and more durable and accurate than conventional drill bits, also providing cleaner holes. Each step is relief-ground to drill and deburr automatically, with laser-engraved size markings to provide best long-term visibility. Optimised 2-flute, ground-sharpened edge geometry offers fast, smooth cutting and Rapid Strike tip improves centering, resulting in less walking and fast drilling without the need to punch or pre-drill the material. Optimised for use with high speed cordless drills. For 1/2" Chucks - Use with Pilot Drill Suitable for Copper, Brass, Stainless Steel & Plastics Spot Drill, Drill & Deburr For 1/2" Chucks - Use with Pilot Drill Suita...