16-piece impact socket set includes a mix of brands such as 9 Craftsman, 1 KTool, 1-Pittsburgh, 3 chrome vanadium, 1 autocraft and 1 without visible marks featuring sizes ranging from 10mm to 21mm in metric and 3/8” to 1” in SAE. The sockets are designed for use with a 1/2″ drive and are made with a 6-point drive type, ensuring a secure grip on nuts and bolts. The 9 Craftsman have manufacturers lifetime warranty, Please check out some of my other vintage tool listings.