Irwin Hanson, 53404, Screw Extractor, EX-4 Spiral Flute, Series: 534, #4 Extractor, 1/4 in Drill, For Screw Size: 9/32 to 3/8 in, 1/8 in NPT, 1/8 in BSP, 8 to 10 mm, 2-7/8 in Overall Length, 1/4 in Shank, Carbon Steel

ITEM FEATURES:

• Designed to remove broken studs, bolts, socket screws and fittings
• Aggressive left hand spiral design for extra gripping power
• 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
• Extractor size and recommended drill bit size are etched on each tool
• TR-88 recommended tap wrench