Century Drill Spiral Flute Screw Extractor Set 6 Piece Square Shank (73414) is the go-to solution for removing broken bolts and screws. Made from hardened tempered alloy steel, these extractors are designed for durability and effectiveness in challenging tasks. The spiral flute design allows for a secure grip on broken fasteners, making extraction easier and more efficient.This spiral flute screw extractor set includes six different sizes, accommodating broken bolts and screws ranging from 3/32-inch to 7/8-inch. The square shank ensures compatibility with various tools, offering versatility and ease of use.  Specifications and Dimensions Flute Type: Spiral Flute Size: #1, #2, #3, #4, #5, #6 Size Range: 3/32" to 7/8" Min Screw Size (SAE): 3/32", 5/32", 7/32", 9/32", 3/8", 5/8" Max Screw Size (SAE): 5/32", 7/32", 9/32", 3/8", 5/8", 7/8" Drill Size (SAE): 5/64", 7/64", 5/32", 1/4", 19/64", 13/32" Shank Type: Square Shank Quantity: 6 Pieces   Key Features and Benefits Effectively removes broken bolts and screws Durable construction from hardened tempered alloy steel Spiral flute design for a secure grip on fasteners Includes six sizes for versatile application Square shank ensures tool compatibility