Precision milled tips prevent cam-out. Tamper-proof design for use in specialized applications. Sturdy and durable chrome vanadium construction. Precision milled tips prevent cam-outs. Rust-resistant finish. Fits 1/4"" and 3/8"" drive ratchets, impact wrenches and impact drivers. Storage rails included for easy organization. Includes: 1/4"" drive: ST-10, ST-15, ST-20, ST-25, ST-28, & ST-30. 3/8"" Drive: ST-40, ST-45, ST-47, ST-50, ST-55, & ST-60. 1pc 3/8"" F x 1/4"" M Socket Adapter. ⚠ 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.