Irwin Tools Hanson 53227 Hex Head Multi-Spline Screw Extractor Set, 25 Piece VERSATILE: Remove broken studs, bolts, socket screws and fittings for high torque applications GRIPPING POWER: Aggressive left hand spiral design for extra gripping power EASY-OUT STYLE: Spiral flutes embed themselves to increase grip as resistance increases ETCHED SIZES: Extractor size and recommended drill bit size are etched on each tool 25-PIECE SET: Hex head multi-spline extractors from 1/8"-7/8" in heavy-duty carrying case