T-Star driver bit is designed for use in wood, masonry, sheet metal and plastic materials. Constructed of carbon steel and resists splitting. Color coding precisely fits Spax screws and results in faster access. Achieves a better transmission of energy, longer service life, faster insertion and better fit.; ; Brand Name: SPAX Drive Type: T-Star Washer Size: T40 Length: 1 in. Product Type: Driver Bit Material: Steel Number in Package: 1 pc Impact Rated: Yes Shank Type: Hex Shank Shank Diameter: 1/4 in. Packaging Type: Blister Carded Magnetic: No Head Type: T-Star Washer