Features: 4 pcs with magnetic for head Hex Torx 100mm screwdriver bars This batch of for head using S2 high quality steel Exquisite workmanship, each edge can be accurately locked screws, no damage to the screw,and the screwdriver for head. Strong magnetic,can suck the screws easily when used it. Can be used for manual electric screwdriver, screwdriver, drill, and other tools. Professional multi size package, hexagonal handle on the edge of 6.35mm. Use different sizes to screw,will damage screwdriver and the screw! Using the correct screwdriver bar,pay the less effort, and can easily unscrew the screws! Specifications: Materials: S2 alloy steel Type of head: Slotted Overall length.: 100mm Type of shank: 6.25mm / 1/4 inch hex Diameter Size: 3/4 /5/6 Quantity: 1 Set/4 Pcs Note: It is manual measurement, there may be 1-2mm error,please to understand. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 4 x Slotted Screwdriver Bits(4 Size)