Off-corner loading design reduces fastener rounding. Black oxide finish to resist corrosion. GEARWRENCH offers a wide range of impact products in open stock & sets that are designed to deliver the performance and strength that the professional users require. They are made from chrome molybdenum alloy steel for exceptional strength and durability. Our sockets have a manganese phosphate coating to resist corrosion. The sockets also feature highly visible laser etched markings and a secondary size hard stamping. The sockets feature off-corner loading to reduce fastener rounding. The GEARWRENCH impact product family will allow the professional user to FORGE AHEAD. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. We usually respond within 24 hours on weekdays. Thank you for shopping at our store. We are working with different suppliers in USA to deliver the item to your doorstep. If you have any issues regarding the item, Feel free to ask.