Specification:Material: alloy steelWeight: 80g/2.8ozQuantity: 6pcs Features: Made of high quality alloy steel, 60-62 high hardness, durable in use. Exquisite workmanship, can lock screws accurately, no damage to the screw. Include many different types of screwdriver , can meet your different needs. Anti-slip handle with ergonomic design that make it easier to operate, more comfortable to hold. All parts are neatly packed in a plastic storage case, convenient to carry and use.