Feature: 1. 4MM HEX WRENCH: This is a 4mm hex wrench, with a 400mm super long bar design, making the operation more convenient. 2. HIGH HARDNESS: Made from S2 alloy steel and quenched, this hex wrench has high hardness and toughness, ensuring long lasting durability. 3. COMFORTABLE HANDLE: The T handle has been wrapped, providing a comfortable grip, will not injury your hand during long term operation. 4. COMPACT SIZE: Compact in size, this T handle hex key wrench is very convenient for carrying, can be used anywhere requiring a hex wrench. 5. MULTI PURPOSE: Widely used for CNC machine maintenance, narrow space adjustment and fastening, car repair lamp adjustment, clothing sewing machine maintenance, etc. Specification: Item Type: Hex Wrench Material: S2 Alloy Steel Specification: Approx. 4mm/0.16in Rod Length: Approx. 400mm/15.7in. Package List: 1 x Hex Wrench