Description: With heat treatment to prevent breakage and wear, this screwdriver bit has maximum durability, and its hardened core has extra strength and reduced fracture, and its service life is long. A screwdriver bit can be used with any electric drill or cordless drill. It is suitable for gypsum board screw positioning and drywall pit drill. It is constructed of alloy steel material. The diameter of each product is 11mm. The length of this product is 65mm. It is suitable for household, industry, workshop, building, etc. Item Name: Screwdriver Bit Material: Alloy Steel Features: Magnetic, High Hardness, Durable, Practical Batch Head Type: PH2 Handle: 1/4 Hexagonal Handle Size Details: Diameter: 11mm/0.43"(Approx.) Length: 65mm/2.56"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 5 x Screwdriver Bit