Material and sizes - 45# steel high-strength deep sockets - Drive size: 1/2 inch (78 mm) - Metric inner hex sizes: 10, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 24 mm - Socket length: 80 mm - Includes: 10 deep sockets (optional) and 1 storage box Durability and protection - Built for long life with high-strength 45# steel to withstand greater torque from impact tools - Black oxide coating provides maximum protection against rust and corrosion Stable design - Concave 6-point internal hex design engages the flat sides of fasteners, not just the edges - Reduces rounding under high torque and hammer loads when used with impact and power tools Size identification - Visible size markings are laser-engraved on all 1.27 cm (12.7 mm) deep sockets for quick and accurate identification Applications and scenarios - Automotive repair and maintenance: ideal for removing and tightening metric hex bolts in engines, suspensions, and other assemblies - Machinery and equipment service: suitable for industrial and workshop maintenance requiring high-torque fastening - DIY and home projects: useful for bike, motorcycle, and general mechanical assembly or repair tasks that demand reliable, durable sockets This description preserves the original specifications and functions while presenting clear, customer-focused information about usage, compatibility, and benefits.