Features and Benefits: All hex drivers forged from high quality chrome molybdenum alloy steel for long lifeAllows for use in confined spacesHeavy duty blow mold case provides durable and convenient storageFully guaranteed All hex drivers forged from high quality chrome molybedenum alloy steel for long life. The impacthex drivers contained in the new 3646 are of the same exceptional quality for which Sunex Tools is known, however, the stubby design allows the technician the space to get the job done in close quarters. Packaged in a heavy duty blow mold case for durable and convenient storage, the 3646 is backed by the same great lifetime guarantee as all of the other impact sockets in the extensive Sunex product line. WARNING: This product can expose you to Nickel (Metallic) a chemical known to the State of California to cause Cancer. For more information go to www.P65Warnings.ca.gov.