Aggressive left hand spiral design for extra gripping power
Designed to remove broken studs, bolts, socket screws and fittings
Extractor size and recommended drill bit size are etched on each tool.
Spiral Flute Screw Extractors - 535/524 Series Set Features:
Spiral flutes are designed to embed themselves deeper into the metal as you turn the tool, so as the fastener resistance increases, the extractor's grip increases