IVY Classic 01360 5-Piece Chrome Alloy-Steel Spiral Screw Extractor Set, Sturdy Plastic Case Designed to remove broken screws, bolts and studs Tapered left hand spiral flute grips screw firmly Chrome Alloy-Steel construction for strength and longevity Polished body and sandblasted flute prevents rust 5-Piece Set includes: #1, #2, #3, #4, #5 spiral screw extractors. See description for drill sizes and screw diameters