Usage Tips:Features: Exquisite workmanship, each edge can be accurately locked screws, no damage to the screw and the screwdriver for head. Powerful magnetic, makes it easy to fix bit and pull screws out. 5 Point Star for Head, Shank: 1/4" Hex, Length: 2"/ 50mm. Made of high quality S2 steel, firm and durable. Good toughness, hard to rupture and wearproof. Widely used for power tools, household appliances, precision instruments industry, furniture industry. Specifications: Material: S2 Steel Type of Head: 5 Point Star Torx for Head Size of Head: T10, T15, T20, T25, T27, T30, T40 Shank: 1/4 Inch Shank Length: 2 Inches/ 50mm Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 7x Torx for Head Screwdriver