Screw driver with hole / solid hexagon $ 6.94 Specifications: 100% brand new and high quality High hardness and good workmanship, durable and practical Strong magnetic can suck the screws easily when used it Can be used for suck screws, electric/manual screwdriver, electric drill, group general tools Material: Steel Color: Black Total Length: 25mm Shank Diameter: 6.35mm Specifications: T6/T7/T8/T9/T10/T15/T20/T25/T27/T30/T35/T40 Hardness: About 58-62 degrees Package Include: 12pcs T6-T40 Screwdriver Bit Set Note: Please allow minor error due to manual measurement. These syringes and needles are NOT sterile so not good for medical.