WHOLESALE 8pc CRV IMPACT ADAPTER AND REDUCER SET. Chrome vanadium steel. Contents: 1/4"" F x 3/8"" M 3/8"" F x 1/2"" M1/2"" F x 3/4"" M3/4"" F x 1"" M3/8"" F x 1/4"" M1/2"" F x 3/8"" M3/4"" F x 1/2"" M1"" F x 3/4"" M. ⚠ WARNING: This product can expose you to Chromium, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.