The Corebilt steel hex key set includes 30 pieces in various sizes, with both metric and SAE measurements. The set features a durable plastic holder for easy storage and organization. Made from high-quality steel, these hex keys are heavy-duty and non-magnetic, with a lifetime warranty. The black color and short/long arm design make them easy to use and identify. Perfect for any home or workshop, this Corebilt hex key set is a reliable tool for any job.