These days this Torx No. 15 x 4 inch screwdriver is used in everything from electronics to work under the hood to changing batteries in toys. While Torx fasteners are more secure, they're also temperamental and demand a precise fit to avoid stripping. This No. 15 head is perfect for a range of uses and applications. Its six-inch overall length is enough to give you the torque you need but compact enough to fit in tighter spaces. The Craftsman Torx No. 15 x 4 inch screwdriver blade is made of alloy steel that's been heat treated to make it stronger and more durable. Its satin-nickel finish resists rust and corrosion, while the butyrate handle resists damage from chemicals. The bottom of the handle is color coded so you'll know at a glance what type of head it has.