Irwin Hex-Head Multi-Spline Screw Extractor, 25-Piece Set: * Multi-spline extractor allows you to engage fasteners without having to drill a starter hole * High-torque design provides more force than most internal-extractor systems * Low-profile, short and stubby shape enables use in confined areas * Strong high-carbon-steel construction ensures professional-grade performance and long-lasting durability * Head Type: Hex-Head Multi-Spline * Material(s): High-Carbon Steel