Features: Excellent impact resistance. During use, it can withstand large impact forces, is not easily broken or deformed, and ensures long-term stable operation. The surfaces of the batch head has undergone special treatments and has anti slip function, which can effectively prevent the batch head from slipping off the screw during operation and improve work efficiency. The screwdriver head is equipped with strong magnetism, which can firmly adhere to screws, making it convenient for tightening or disassembling screws in small spaces or vertical surfaces that are not easy to operate. The batch head has threads, which can better pair with the screw grooves, increase the contact area, and make the tightening and dismantling of screws easy and fast. The size specifications of this batch of head sets include six different sizes (25mm, 50mm, 65mm, 70mm, 90mm, 150mm) ranging from 25-150mm, which can meet the needs of different work scenarios and screw specifications. Suitable for various electric tool such as drills, electric screwdrivers, etc., and can also be used with manual screwdrivers. Whether home maintenance, professional decoration, or industrial production, it can demonstrate its excellent performances. Specifications: Material:Steel Specifications: 25mm, 50mm, 65mm, 70mm, 90mm, 150mm Package Includes: 6Pcs Screwdriver Bit note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.