About This 🔧High-Quality CR-MO Steel: Made of heat-treated and high-quality chromium molybdenum steel.Durable and not easily damaged. 🔧Multiple Size to Meet All Your Need, 29pcs including:7/8", 27/32", 13/16", 25/32", 3/4", 23/32" , 11/16", 21/32", 5/8", 39/64", 19/32", 37/64", 9/16", 17/32",1/2", 15/32", 29/64", 7/16", 13/32", 3/8", 11/32", 5 /16", 19/64", 9/32", 1/4", 7/32", 3/16" 5/32", 1/8" 🔧Easy to use:Suitable for both power tools and hand tools,high density spiral design helps faster removing broken screws, bolts, nuts, studs, fittings, threaded pipes and pins. 🔧Stamping size:all the size is engraved on the socket for easy identification,chamfered bit ensures a smooth fit onto fasteners. Whether it‘s for car maintenance or daily use, it can provide you with great convenience. 🔧XEWEA offer 7*24h customer after-sales support. If you have any questions, please feel free to contact us via Amazon,we will definitely give you a satisfactory reply.