Specification: Material: 40crmo Contains standard & deep sizes: 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22mm 3/8" drive Condition: 100% New Warranty: 2 Years Package included: 32x 3/8" Drive Impact Socket Set Feature: 1. Premium Quality Sockets: Made from high strength Chromium-Molybdenum steel for durability and long lasting performance. 2. Comprehensive Size Range: Includes both standard and deep impact sockets from 7mm to 22mm for a variety of automotive and mechanical repair jobs. 3. Compatibility: Designed to fit 3/8 inch square drive air and power tools for heavy duty impacts and extended use. 4. Secure Fit: Each socket features a hole on each side to securely lock onto the drive tool using a pin and ring for solid connections under pressure.