Grey Pneumatic 81659CRD 3/8 Drive Standard and Deep Length Duo-Socket Set, 59 Pieces. Set contains all standard and deep length 6 point sockets in both fractional and metric sizes; plus a 72 tooth quick release ratchet and two extensions. Fractional sizes 5/16″ to 1″ and metric sizes 7mm to 22mm. Versatile Socket Coverage: This comprehensive set includes 59 pieces, featuring both standard and deep length sockets in fractional (5/16″ to 1″) and metric (7mm to 22mm) sizes. This wide range allows you to tackle a variety of fastening tasks without needing multiple socket sets. Duo-Socket Functionality: The “Duo-Socket” design combines two functionalities into one socket. This eliminates the need to switch between sockets for standard and deep applications, saving you time and effort during projects. Professional-Grade Quality: Built with the needs of professional technicians in mind, the Grey Pneumatic 81659CRD boasts a 72-tooth quick-release ratchet for smooth operation, and includes two extension bars for additional reach in confined spaces. The set is constructed from durable materials to ensure long-lasting performance. 12 Pieces Fractional Standard Length Sizes. 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″, 13/16″, 7/8″, 15/16″, 1″. 12 Pieces Fractional Deep Length Sizes. 16 Pieces Metric Standard Length Sizes. 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm. 16 Pieces Metric Deep Length Sizes. 2 Pieces Extension(s). Type: High Torque, 6-Point, Standard/Deep Length, SAE Fractional/Metric. Drive Size: 3/8 Inch. Number of Pieces: 59. Material: Chrome-Molybdenum Alloy Steel. Packaging Type: Molded Case. Applications: Automotive, Industrial, Assembly, Mining, Maintenance, Construction and Energy Industry.